
Why it matters for mental health; how to make improvements without succumbing to snake oil; and why you should be looking at your poop. is a board certified gastroenterologist and the Gutbliss, The Microbiome Solution, The Bloat Cure, and The...
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Dr. Robin Chutkan
Foreign.
Dan Harris
This is the 10% Happier podcast. I'm Dan Harris. Hey everybody, how we doing? As you probably know, your gut health is incredibly important for your overall health and specifically for your mental health. You may have heard about the gut brain axis, a two way communication system involving nerves, hormones and immune signals. The gut microbiome helps regulate neurotransmitters like serotonin and can influence inflammation, which affects mood and cognition. In short, a healthy gut can help support clearer thinking, better stress, resilience and a more stable mood. And yet, when it comes to addressing your gut health, there is so much bullshit and snake oil out there, like a tidal wave of nonsense. So today we've got one of the world's leading experts on gut health. She's not trying to sell any supplements to you. She's just trying to give you some basic tools to have a healthier gut so you can have a healthier brain. And she's not afraid, as you will hear, to take this conversation into some supremely uncomfortable areas, including the importance of looking at your poop. Dr. Robin Chutkan is a board certified gastroenterologist and the author of four books, Gut the Microbiome Solution, the Bloat Cure and the Antiviral Gut. She's also the host of the Gut Bliss podcast. In this conversation, we talk about the relationship between gut health and mental health, the microbiome, what it is, why it's so important, and how you can view it through a Buddhist lens. She gives us a crash course on the Digestive System 101. She talks about how to navigate all the snake oil out there and why some supplements you're taking might be making your gut worse. We go deep on acid reflux, a bugaboo of mine. We talk about the downsides of chewing gum, how to distinguish belly fat versus bloat, and why not all gas is bad. Just to say before we dive in here, we're now in week three of our month long series called Get Fit Sanely where we talk about how to take care of your body without losing your mind. And every episode this month comes with a bespoke guided meditation only for paying subscribers over on danharris.com Today's meditation is called when youn Want to Eat yout Feelings. In it, the great Dharma teacher and my friend Cara Lai helps you eat mindfully, which is a game changing skill in my experience. Oh, and tomorrow Cara and I will do a live video session. Cara will guide a meditation and then we'll take your questions for more information head on over to danharris.com okay, we'll get started with Dr. Robin Chutkan right after this funny story. I went to a funeral the other day. I know that's an odd sentence, so there's nothing funny about the death that had necessitated this funeral. But there's a funny story associated with my attendance at said funeral. The first thing I had to do is go to a football game before the funeral that my son was playing in a flag football game. And so I grabbed a suit off the shelf, a dark suit, and I put it in my car. And I hadn't worn the suit in a long time because I don't really wear suits anymore now that I'm no longer a news anchor. And then after the football game, when I went back to the car to get changed, I realized that moths had eaten holes into the crotch of the pants of the suit. And I didn't have any other suit to wear. And I was wait till the funeral. So I had no choice but to wear that and to hold my wife's jacket in front of my midsection the whole time at the funeral. And not to mention the fact that my midsection is a little bit larger than it used to be and the pants didn't fit. I felt awkward and uncomfortable the whole time. I bring that up because when you have the right clothes, you can actually be much more confident. 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Hair loss is frustrating and you don't have to fight it alone. Thanks to irestore Dr. Robin Chutkan. Welcome to the show.
Dr. Robin Chutkan
Thank you so much, Dan Harris, for having me.
Dan Harris
I feel like this conversation is gonna make me uncomfortable in all sorts of ways, which I'm looking forward to. That's always the sign of a good conversation.
Dr. Robin Chutkan
As long as you're prepared to discuss your bomb movements in detail, there's absolutely nothing to be nervous or worried about.
Dan Harris
Here we go. All right, so let me start at the high, high level. You look at gut health, I want to understand, like, why is that so important, especially as it pertains to mental health?
Dr. Robin Chutkan
So the first thing I want you to do, Dan, is just look down at your belly. Like, literally just look down and see where your gut is located.
Dan Harris
I'm looking.
Dr. Robin Chutkan
It is in the absolute center of your body.
Dan Harris
Yep.
Dr. Robin Chutkan
It is literally the engine for everything. So imagine like a wheel and then there's spokes going off. So there's a spoke going up to the brain stuff to the heart, the lungs, the bones, the joints, your immune system. So your gut is the engine that drives everything. Full disclosure, I don't know anything about car engines, but I would imagine that if your car engine breaks down, even if the brakes are working or the carburetor is working or something else, you are not going to get very far because your engine is not working. So the gut really fuels the entire body. And here's the interesting thing. Even if you're eating a super healthy diet, if any of the major components of the gut are off, if the gut lining is too permeable, if the gut ph is off, if the gut microbiome is disrupted, you are not going to be absorbing those nutrients properly. So you can be eating a super healthy diet. If the gut is not optimized, those nutrients aren't going to get absorbed and assimilated and they're not going to get to the brain and the immune system and all the other parts of the body. So that's why the gut, you know, everybody in medicine thinks that their field is the most important. The neurosurgeon think it's the brain, but it's the gut. I'm here to tell you for sure.
Dan Harris
Let me just go back to one aspect of the question. I think I understand writ large why the gut is so important as the hub of the body. But this is a show that concerns itself with the, the mind. Everybody knows there's a gut brain connection. Can you just hold forth on that idea?
Dr. Robin Chutkan
Sure. So you mean we're not gonna spend the entire hour talking about bowel movements and how to have, you know, mama jama poos and stool nirvana where this is mental health? Absolutely, absolutely.
Dan Harris
In all seriousness, we will get to all those things. We will get to all those things. I promise I'm gonna push it off as long as possible.
Dr. Robin Chutkan
There is something called the enteric nervous system, which has been referred to as a second brain in the gut. And it has about seven times as many nerve cells as a spinal cord. It doesn't have as much as a central nervous system, but very highly innervated with nerve cells. And there is this constant sort of bidirectional communication. The gut is communicating with the brain and the brain is communicating with the gut. And what are they telling each other? The brain is controlling things like gut motility, enzyme secretion, and also nutrient absorption that we talked about. And the gut is controlling things like mood and memory. And when I say controlling, not completely, but influencing dramatically. And a lot of that influence has to do with the neurotransmitters that work in the brain. Things like serotonin and dopamine, et cetera, but they're actually co produced in the gut. Gut bacteria are really essential. And not just the bacteria, you have to have the optimal pH, you have to have the optimal sort of enzymatic milieu for those neurotransmitters and other substances to be adequately produced and transmitted to the brain. So it's really a very, very clear connection. I mean, the gut brain connection is probably more important, if you will, than the gut connection to any other organ.
Dan Harris
Anytime any part of your body is in pain or discomfort, it will impact your mental health. But there's something really key about if your stomach is rumbling either from hunger and then you get too hangry, or from an upset stomach where you get to irritable. I'm thinking of the word dyspeptic, which I believe is connected to the gut, as in Pepto Bismol.
Dr. Robin Chutkan
Absolutely.
Dan Harris
Yeah, yeah. And in the reverse direction that when you have something psychological happening, it can impact what's happening in your gut. This seems of all the body parts to have an outsized influence on, on our well being on a moment to moment basis 100%.
Dr. Robin Chutkan
And the term you just described, dyspeptic. So dys, meaning off, and peptic, is really stomach, referring to peps and another digestive enzyme. So it's sort of an off stomach. If we look back at the 1800s to conditions like melancholy, which we now consider to be a form of depression, we know that people were treating melancholia with diet, changing their diet, putting them on a high fiber diet. We'll talk about that. From as far back as the 1880s, we know that Parkinson's disease, a disorder that we think of as affecting the brain. We think of Parkinson's, it's a movement disorder, it involves a brain, and it's a degenerative brain disorder. We know that it begins in the gut. There's a theory called the gut first theory of Parkinson's. And it was shown by a German neuroanatomist, Dr. Brock, that the changes that you see in the brain years before, sometimes decades before the patient manifests signs of Parkinson's, there are these changes in the gut, in the neural cells along the lining of the gut. And they've done some really sophisticated experiments where they have taken some of these proteins and injected them into the gut in mice, and then showing the Parkinsonian changes turning up in the brain and the behavior in the brain later on. So we think of these diseases as brain diseases. We think of diseases like Parkinson's and autism spectrum and some forms of dementia like Alzheimer's, and they very much are brain diseases. But it turns out that a lot of them actually have their origins in the gut. So we have evidence, for example, with Parkinson's, of something called a gut first theory. Dr. Brock looked at the brains of Parkinson's and he could see these abnormal proteins called alpha synuclein proteins. But then he also saw them in the gut, and he saw them in the gut, Dan, Sometimes decades before, the changes were turning up in the brain. Now, of course, these are autopsy studies, but they've done some really sophisticated studies in mice where they inject the abnormal protein from the brain into the gut and they see it traveling up and they see Parkinson's developing. So this has formed the basis of, again, something called a gut first theory that suggests that a lot of these disorders actually have their origins in the gut. And I think that's one of the clearest connections between the gut and the brain.
Dan Harris
We will go deep, deep, deep on practical aspects, but let me just stay on a high level for a second in terms of getting you to teach us about the gut. What is the microbiome. And why is that important?
Dr. Robin Chutkan
The microbiome refers to all the organisms that live in and on our bodies, mostly in our gut. And not just bacteria. Certainly bacteria constitute a large proportion of the microbiome, but also viruses, fungal organisms, parasites, wan cell protozoa organisms, and archaea. So there's several different types. If we sort of scraped them all up, they are of course microscopic, but if we scraped them all up, they'd weigh about three or four pounds. And they're a more unique identifier of you than your own DNA. So I can recognize Dan Harris with more accuracy by looking at your microbiome than I can by looking at your DNA.
Dan Harris
So there are ways to eat and exercise that all impact the microbiome.
Dr. Robin Chutkan
Absolutely everything we do impacts our microbiome. Our microbiome reflects where we've lived, what we've eaten, medications we've taken, the stress in our life, whether we've had a dog in our family or not. All of these things impact what's going on in the microbiome. And yes, diet is probably the most potent tool for modifying sort of where we are now, right. We have the microbiome we have based on whether we were born vaginally or via C section, whether we were born at home or in a hospital, whether we were nursed, what we've eaten, the medications, the stress, all of these things. But where you are now, and particularly if you are somebody struggling with mental health, struggling with an autoimmune disease, or are just bloated and constipated and looking to have better gut health, the food, the diet is an incredibly potent tool because what these microbes eat really influences what they're making. The post metabolites that they're creating, things like short chain fatty acids that have a profound impact on our brain health and our gut health and our immune health.
Dan Harris
Whenever the microbiome comes up in conversation, which is actually not super rare in my house, given that my wife spent some time researching the microbiome as it relates to transplant patients back when she was a researcher. I always think about it through a Buddhist lens. You know, in Buddhism, one of the primary assertions is that the self is not as real as we think it is. Yes, I am Dan. And but on some fundamental level, there's no essence of Dan. It's just made up of lots of composite parts. And many people think, well, my body, they pound their chest and say, well, this is me. But three pounds of you are other living organisms. And so that's just such a Fascinating thing.
Dr. Robin Chutkan
And not just three pounds of you, because that might seem sort of inconsequential as a small percentage of your weight, but we have three to four times as many microbial cells as we have human cells. So we really are more microbes than humans. I love the Buddhist analogy. And I also like to think of it as a beehive. So the hive is an inanimate object and the hive is animated by the bees. That's who's doing all the work. So the microbes are synthesizing the neurotransmitters, are clearing out toxins or helping with absorption. They're training the immune system. They are co producing things like vitamin K that we can't produce on our own without our microbes. So we are really animated by them.
Dan Harris
Fascinating. The next question I want to ask so we can get a clear sense of the landscape here is can you give us 101 on the Digestive system?
Dr. Robin Chutkan
Sure, I would love to. The digestive system really encompasses from our mouth to our anus. And actually a funny story about that. When I was writing my first book, Gut Bliss, which came out now about 12 years ago, my daughter, who at the time must have been about six or seven, she said, mommy, you should call it in the gut and out the butt. And that sort of sums it up right from mouth to anus. So even though the air, nose and throat folks claim the mouth, the mouth is where digestion begins. And digestion begins. Dan, before you even eat, when you see the food, if you smell the food, even thinking about certain foods can create a salivary response, right? So our salivary glands start to release enzymes, amylase, different sort of enzymes that help to break down the food. So digestion really begins in the mouth. The salivary enzymes start to work on breaking down the food. And then from the mouth it travels down this sort of straight long tube called the esophagus and it travels sort of like that inchworm. It contracts, releases, contracts, releases to help it get down. At the top of the esophagus you have the upper esophageal sphincter that has to open to let the food into the esophagus. Then you have a lower esophageal sphincter at the bottom. And when that one opens, it lets the food into the stomach. And then in the stomach the food is churned up into something called Chyme into these small pieces. And, and that's also where a lot of the enzymes, things like gastrin and different peptic enzymes, start to break down the food. Hydrochloric acid is released by cells in the stomach. And so when the food leaves the stomach, it enters the small intestine. And the small intestine, also known as a small bowel, has three parts, duodenum, jejunum, and ileum. And I remembered it in medical school as dogs jump in. Don't ask me why, but that was my mnemonic for duodenum, jejunum, and ileum. And each part of the small intestine has a specialized function. So the duodenum is close to the pancreas. It's connected to the gallbladder. That's where a lot of the bile is released from the gallbladder. That's also one of our organs. And that bile helps to emulsify fat. It's kind of like if you have a greasy plate and you're trying to wash it and it's not getting clean, but then you put some dishwashing liquid on it, and all of a sudden it's squeaky clean. So the dishwashing liquid emulsifies the fat, so you can get it off the plate. And, well, some of these enzymes and some of these substances, like bile. Bile emulsifies the fat, so it can be absorbed through the gut lining in the duodenum. The jejunum has all kinds of specialized functions, too. The ileum, which is the last part of the small intestine. Remember, dogs jump in before the large intestine, also called a large bowel, also called the colon, just to confuse you. That ileum is the last part that connects it, and that's where a lot of important things are absorbed. For example, B12 is absorbed in the ileum. Those bile salts that are released from the gallbladder and travel all the way down and emulsify the fats. They are recycled through the ileum. And then we get into the colon. And the colon has many parts. It has a cecum, which is a part that's joined to the small intestine. It has an ascending colon that goes up on your right side. It has a transverse colon that goes across, then a descending colon, then a sigmoid, then a rectum than out the other end. So the really key thing about it is that it's specialized along every inch. The cells are different. For example, the cells lining the esophagus are completely different. They're squamous cells, and they are not resistant to acid. And so that's why if you get acid in the esophagus, that's a problem. You get Reflux. The cells in the stomach are columnar cells and they are resistant to acid because you're supposed to have acid in the stomach. So you have all these different sort of specialized areas of the intestine. And they're all important and they all do different things and then the microbes are different in different areas. So in the upper GI tract, we have much fewer microbes than in the colon because the colon is where all the fermentation happens. And so that's where we're supposed to have all the microbes. One of the things that happens is people take these acid blockers, proton pump inhibitors, and they mess up the PH of the gut and they completely disrupt that gradient. So there's so many things that people do unknowingly, like, oh, I'm having reflux, I'm going to take an acid blocker. They don't think about the consequences of what that means for your ph gradient and the balance of the microbiome. And again, back to mental health. We're seeing that so many of these medications that people take or things in the food like artificial sweeteners and emulsifiers and things like that can really have a profound impact on the gut and they can have a profound impact on the brain. I mean, we're seeing all these studies on ultra processed foods, particularly in kids. A lot of that work was done by Dr. Monteiro in Brazil. I'm not suggesting that you can get rid of mental illness in teenagers using food. But there's a whole new field of nutritional psychiatry. People like Dr. Drew Ramsey and Dr. Umanedu are really at the forefront of that, of looking at how can we use dietary therapy in conjunction with pharmaceutical therapy, not necessarily instead of to really enhance and optimize mental health. And you know, in some of the studies, it's really profound. Cause some of the food studies have better results than the pharmaceutical studies.
Dan Harris
Uma, by the way, has been on the show. I'll drop a link in the show notes to that.
Dr. Robin Chutkan
She's great.
Dan Harris
She is great. Coming up, Dr. Robin Chutkan talks about why we should approach this whole topic with some wariness. We go deep on acid reflux, something I have long struggled with. We talk about the downsides of chewing gum, and she gives us some very simple lifestyle practices that we know from the evidence can promote microbial balance. Imagine you're a business owner who has to rely on a dozen different software programs to run your company, none of which are connected. And each one is more expensive and more complicated than the last. It can be pretty stressful. Now imagine Odoo. Odoo has all the programs you'll ever need and they are all connected on one simple, easy to use platform, giving you peace of mind that your business is always being taken care of from every angle. Odoo has user friendly open source applications for everything. We're talking CRM, accounting, inventory, manufacturing, marketing, HR and everything in between. Basically, if your business needs it, Odoo's got it. Odoo sounds pretty amazing, right? So stop wasting your time and money on those expensive disconnected platforms and let Odoo harmonize your business with simple, efficient software that can handle everything for a fraction of the price. It doesn't get much better than that. So what are you waiting for? Discover how Odoo can take your business to the next level by visiting odoo.com that's O-O-O.com odoo modern management made Simple I'm not big on trends. I'm not, you know, following the latest from the runways in Paris. But I am big on clothes that feel good and last. That's why I keep going back to Quint. Their lightweight layers and high quality staples have become my everyday essentials. Quint says all the things you actually want to wear this summer, like organic cotton silk polos, European linen beach shorts and comfortable pants that work for everything from backyard hangs to nice dinners. I can attest to that because I have, I think, four pairs of comfortable pants from Quint's and I can wear them when I go to a fancy pants restaurant or when I'm just chilling with friends in the backyard here. The best part? Everything from Quint is half the cost of similar brands. By working directly with top artisans and cutting out the middlemen, Quint gives you luxury pieces without the markups. And Quint only works with factories that use safe, ethical and responsible manufacturing practices and premium fabrics and finishes. I use this stuff and you should too. Yes, it's true that Quint is a sponsor of the show and they have sent me some free stuff, but I actually go to Quint's and order more stuff because I like it. And maybe this is tmi, but I'm quite into their boxer briefs and their socks. I also have tons of sweaters from them. It's good stuff. Stick to the staples that last with elevated essentials from quints. Go to quince.com happier for free shipping on your order and 365 day returns. That's Q u I-N-C e.com happier Q U-I-N-C-E.com happier to get free shipping and 365 day returns quince.com happier foreign so before we get to the tips, let me just ask you one last question, which is you've said this, so I'm not telling you anything you don't know or I'm not presenting this observation as if it is original. When it comes to gut health, my sense is there's a lot of snake oil out there. There's a lot of over promising, a lot of hype. And so why should we approach this subject with some wariness? And how bad is the snake oil?
Dr. Robin Chutkan
The snake oil is terrible. It's terrible. There is so much selling and this idea of hacking. And the analogy I like to use is if you are planning on running a marathon, you might get new shoes and cool shorts and you might even take some protein powder. But you are not gonna get to 26.2 miles with protein powder. You've gotta put in the miles. But when it comes to gut health, people seem to feel like, oh, I'm just gonna take some zinc and glutamine and the right probiotic, I'm gonna rub it all together and it's going to fix my microbiome, it's going to zip up the gut lining, it's going to rebalance things. And I've been around a little while, Dan. I finished medical school in 1991 and I finished my GI training in 1997. So I've been a physician for over 30 years and a practicing gastroenterologist for around 28. And I will tell you that the snake oil is insane because 20 years ago or even 10 years ago, there were folks out there who were taking stuff. But now everybody is taking stuff. And the problem is a lot of these things that they're taking are actually part of the problem. I see people coming in and they're taking all these different substances, multiple powders, protein powders, collagen powders, and they have GI distress. And often just by getting them to stop this stuff, we're seeing improvements in their GI tract. So what I tell people is, you know, when somebody tells you who they are, believe them. As Maya Angelou famously said, so when it says on the bottle, this product is not designed to treat, cure any disorder. Believe it. This stuff is not tested for safety, it's not tested for efficacy. And the gut is a really tender organ. All these things that you take, I mean, you're taking them by mouth, you are ingesting them, they are traveling through the gut and so many of them are. Again, they're disrupting the gut lining. They're messing up your microbiome, they're changing the phone. And then they also have to be metabolized through your liver, which is another tender organ, especially if you're taking medications or you drink alcohol regularly. Some of them are excreted through the kidneys. So we see a lot of problems. We had a situation several years ago with a young woman who ended up with a liver transplant because she was taking so many different supplements that her mother had recommended. So I don't know what it is right now. Certainly the idea that a lot of these things are originating from the gut, whether it is a mental health struggle or an immune system that's not functioning correctly, this is true. A lot of time it is. But the answer is not, oh, I'm gonna take a pill and fix it. The answer most of the time is to say, what am I doing that is disrupting this incredible system that I was born with, that the default setting is for it to work? Am I taking too many antibiotics? Am I using too many artificial sweeteners? Am I taking an acid blocker? Am I not getting enough fiber? Rather than let me add something. So I'm a huge advocate for really using this feedback. Our gut gives us incredible feedback, whether it's constipation or smelly gas or bloating or discomfort or reflux. So what can I do with this feedback? And if you think about something like reflux, the foundation of treating reflux is lifestyle modification. So it's not taking an acid blocker that is literally going to disrupt your gut physical imbalance, your microbiome, put you at risk for bone disease and kidney disease and all kinds of things long term, and also make you more susceptible to viruses. By the way, we had a very important study that showed people taking that kind of acid suppression are two to fourfold more likely to be infected when exposed to a virus because they block stomach acid. And stomach acid is one of our main defenses for when we ingest a virus. So rather than doing that, which, yes, it's gonna get you some symptom relief, but at a cost, maybe we should really ask ourselves, hmm, how much coffee am I drinking in the morning that's gonna cause reflux? How much alcohol am I drinking that's gonna cause reflux? How much chocolate am I eating that's gonna open up the sphincter? Am I eating too large a meal that is overfilling my stomach and stuff is coming out? Am I eating too late? At night because the GI tract is tied to the light dark cycle. So once the sun sets, it's pretty much gone to bed. Am I eating too much fat in my meals? Which slows down the stomach emptying. So, you know, not to take away everyone's fun of coffee and chocolate and eating something late at night, but again, it's really important feedback. And what do we do? We are like, oh, yeah, I'm not gonna listen to that. I'm just gonna block stomach acid and mess up my digestion and hope for the best. So I'm so glad you brought that up, because clearly people are struggling and they're looking for answers. And, you know, to be honest, Dan, I kind of blame conventional gastroenterology. I'm a conventionally trained gastroenterologist, and we spent a lot of time just scoping people because it's really lucrative doing colonoscopy compared to sitting down in the office. And, you know, if I mention the reimbursement, what gastroenterologists make on the facility fee, the physician fee, the pathology, the anesthesia, I'm just being very honest here. It is thousands of dollars versus, you know, I might get reimbursed $125 to sit and chat with you for an hour and try and solve your problem versus I'm making several thousand dollars doing a colonoscopy. And that's just a reality. That's not to throw shade on my GI colleagues, who are mostly wonderful people. And colonoscopy does save lives looking for colon cancer, but we're doing this sort of disproportionate number of procedures, and we're not paying attention to these problems people are having. And so the gaps have been filled in by people saying, oh, I have a zinc supplement to sell you, and, you know, here's a gut restore. And, I mean, it's crazy. I, as you probably know, launched a Gut Bliss podcast last year, and I will tell you that every week I get at least a dozen and usually 20 or 30 solicitations from these companies of, you know, oh, we want to, you know, support your podcast. And I'm really proud to say that I. I resist because I'm just not going to participate in the selling of snake oil.
Dan Harris
There may be some disambiguation that's worthwhile here. Like, on the one hand, I think of snake oil as disreputable people, dishonest people selling you things that you don't need that not only is a waste of money, but also could have deleterious impacts on your health. And then the other hand, there are sort of misguided or financially motivated moves made by the medical community, people who are credentialed and have taken an oath. And so, for example, you talk about acid blockers, and I could be mixing things up here, but I've had reflux and have been prescribed what I think protease pump inhibitors or something like that.
Dr. Robin Chutkan
Proton pump inhibitor. Right, Like Nexium or one of these drugs.
Dan Harris
Yeah. So is that an acid blocker?
Dr. Robin Chutkan
Yeah, that's a proton pump inhibitor.
Dan Harris
Okay.
Dr. Robin Chutkan
It's an important distinction because the motivation behind it is important. So, you know, I get really sort of zealous about this, so I'm glad that you qualified that. A lot of the people who are pushing these supplements are not healthcare practitioners, and maybe they don't know that the supplement works. They're like, oh, this seems like a great idea. I'm gonna try and push this enzyme. So I give them a little more of a pass than I do somebody with a medical background. But either way, the gastroenterologist who's prescribing the proton pump inhibitor, that's going to solve your problem. Likely that's going to make your reflux better, but at a cost. So it's not that it's the wrong thing. It's that they're starting at the top of the pyramid when they should be starting at the bottom of the pyramid with some basic diet and lifestyle habits. And I'm not talking about necessarily turning people into a teetotaler or saying, you could never drink coffee, but maybe cutting down from three cups to one, having one glass of wine instead of two, having it earlier, having smaller meals, eating earlier, swapping out your big meal for lunch instead of dinner. Those are really basic things. Rather than the first thing I'm gonna do is I'm gonna say, yeah, you have reflux. Take this pill. And I'm not gonna tell you that, by the way, this pill is going to make you twice as likely to become infected if you get exposed to a virus like SARS CoV2. This pill is going to really disrupt your digestion to the point where you may become iron deficient, et cetera. You're not gonna be absorbing nutrients properly. So I think we're just not using these things judiciously. These are fantastic drugs. I mean, proton pump inhibitors are really good at what they do. They're just overutilized.
Dan Harris
It's wild to think about just very personally. And I'm gonna move on from this because it's. I Think a little bit local to me or to anybody who has reflux. But I've had reflux for 20 years, and nobody's ever had the conversation with me that you're having with me. And I've seen many, many doctors, and it's always about, do this next scope, do this next test, do this, take this pill, et cetera, et cetera. Okay, let's move on to.
Dr. Robin Chutkan
But, Dan, wait. But wait. But people want us to solve your reflux right now. So tell me like, a little bit of, you know, not. I mean, this is better than a rectal exam, right? For sure. We're just talking about reflux because we're not in the same place. So that's not possible. But in all seriousness, are you a coffee drinker?
Dan Harris
Nope, I don't drink coffee. I don't drink alcohol. I don't eat chocolate.
Dr. Robin Chutkan
What time do you have dinner?
Dan Harris
Usually six or seven.
Dr. Robin Chutkan
Okay.
Dan Harris
It's rare that it would be later than that.
Dr. Robin Chutkan
Is that your biggest meal, usually dinner?
Dan Harris
Yeah, I think it is my biggest meal. That's probably a problem. But I can get. If I eat a lot at lunch, I can also get reflux. And it's not that bad. And it's usually. Honestly, the thing that makes it go away is sugar free mint gum.
Dr. Robin Chutkan
Well, mint can be really helpful, but I don't love the sugar free because those artificial sweeteners also disrupt your microbiome. But you're like a. A minus. Cause no caffeine, no alcohol. That right there is huge. That's gonna eliminate reflux for most people. No chocolate. I don't know how you do it, but kudos to you for that too. So you're doing.
Dan Harris
Just to be clear, I love chocolate, but it doesn't love me back. I have panic disorder. And there's caff. Caffeine in the chocolate, so it makes me anxious.
Dr. Robin Chutkan
Yeah. And the caffeine also opens up that lower esophageal sphincter. So you're killing two birds. So it sounds like the issue is a capacitance issue, like once your stomach gets pretty full. And that can happen earlier in the day at lunch and at night. So have you found that you're managing that? Like, are you eating smaller meals?
Dan Harris
No, no, not really. Which is.
Dr. Robin Chutkan
But what's happening with the reflux?
Dan Harris
Well, I still have it, but, you know, I went and got a test where they actually, like, have you drink something and then they watch it go through that showed that I didn't really have bad reflux. So I don't know what that, what that means. It's definitely not a severe case. And like I said, if I have some mint gum, it goes away.
Dr. Robin Chutkan
Yeah, well, it's good they did that test because the scope shows the damage if you have reflux, but it doesn't show whether you have reflux. So it sounds like you probably had something like a 24 hour ph test where they check and see how much of the time the acid is coming up. The other test that can be helpful is something called a gastric emptying study where they see how long it takes for your stomach to empty. Those are helpful tests. So it sounds like you're a gastroenterologist. We're doing some good evaluation, but that's really important because you don't wanna be taking a drug like a proton pump inhibitor if you don't have reflux because again, the drugs can be so disruptive.
Dan Harris
I took them and it didn't work, so I stopped. And now I live with it and it's not a huge problem. And it really depends on what I eat. If I eat set of crappy food, it's way worse. If I eat super healthy food, it could still be there. Like I had a salad for lunch and I have a little like a tiny bit of reflux and I chew a stick of gum and it goes away. But I'm curious about sugar free gum because I chew a lot of gum and that sounds like a bad thing to do.
Dr. Robin Chutkan
Yeah, it is because of the sugar free. So the artificial sweeteners we know are really disruptive to the gut. And the interesting thing about artificial sweeteners for people who might be using them for weight loss is that we know insulin is released not in response to calories, but in response to sweetness. And we know that artificial sweeteners, as we call them, non nutritive sweeteners, are plenty sweet. So even though if you burn those calories in a lab, in a calorimeter, it may be low or zero, it doesn't mean that when you drink that stuff you're not gaining weight. So if we look at something like a diet soda, a typical canna diet soda, it might say zero calories, but a typical soda is somewhere around, I think, 150 calories times 365 days and then divided by 3,500 calories in a pound, it works out to about 15 and a half pounds a year. And, and so a lot of those people are drinking diet sodas thinking, oh, this is great, this is free, are actually experiencing weight gain because they're having insulin release from the diet soda. And so I know you're not having the gum for that reason, but what you might wanna try is there are some ginger, peppermint and fennel oil capsules that you can try. I'll email you them later. But it's just a little bit of peppermint oil, ginger oil, and fennel oil. And those have worked tremendously well for my patients who respond to mint. You know, it's really hard to find peppermint gum, any kind of gum, without an artificial sweetener. But if you can, that would be great because I think it's a mint that's helping.
Dan Harris
Interesting. Okay, so let's get to the tips that are for everybody, not just the host, exercising his prerogative, perhaps inappropriately. The overarching framework you have is dirt, sweat, veg, or vegetables. So let's start with dirt. What do you mean by dirt? And how do we operationalize this idea?
Dr. Robin Chutkan
Exposure to nature. So where do we get our microbes after that sort of prophetic journey through the birth canal? Those of us who are lucky enough to be born vaginally, because that's where we get them.
Dan Harris
Right.
Dr. Robin Chutkan
If you've ever seen a live delivery, if you've ever been present, you see that as a baby's head cross crowns. As it starts to come out, it turns posteriorly, it turns to face the tush. And that is so that the baby can swallow a mouthful of microbes and get colonized with its own microbiome. So we know that babies who are born via C section miss out on that. And they tend to be colonized with hospital acquired bacteria, not as healthy. And just that single difference actually puts them at risk, at increased risk for things like allergies and asthma and autoimmune disease later on. That doubles if they're not nursed, or increases, rather, not doubles. So we know that we get that initial colonization, but then after that, where do we get it? We get it from dirt, from soil. We get it from food that's grown in microbially rich soil. There are studies that show that families that have a dog, the kids require fewer antibiotics, tend to have fewer allergies because the dog is bringing dirt into the home. We know that there are things like the outdoor air factor that refers to the germicidal constituent in air, which means the ability of air to literally kill harmful bacteria, viruses, et cetera. So there's a famous study that was written about the Spanish flu about a hundred years ago now, about 110 years ago, and it Compared the soldiers who recuperated outside in cots versus the ones in the hospital. So of course the officers were put in the hospital, in a hospital room to recover, while the enlisted folks were just in these cots outside. Well, they had a 40% higher survival. Because it turns out that this outdoor air is really good for you for recovery as well as for decreasing your risk. I mean, you remember during pandemic, like outdoor activities were safer, right? Not just because there's less spread outside, but also this outdoor air factor has to do with it. We know that things like forest bathing, the Japanese call it shinrin yoku, that being outside in nature, the plants have not just the phytochemicals that we get when we eat them, but they have these phytocyanins, these substances that the plants themselves use to fight viruses, bacteria, et cetera, fungal organisms, and they release them. You don't have to actually hug the tree or like roll around in the grass. Just being outside in nature is very replenishing to our microbiome. So that's the dirt. Plus, from a mental health point of view, and you know this far better than I do, there's something really profoundly grounding, nurturing, balancing about being out in nature. Right. In terms of our brain health too, not just our gut health. So that's a dart.
Dan Harris
One thing to say quickly to the listeners, we've done a bunch of episodes on the importance of nature as it pertains to mental health and in fact a three part series recently with Dacher Keltner. So I'll drop links to those episodes in the show notes, but just on this dirt piece, which is the first of three large buckets when it comes to attacking your gut health, how much time do we need to be spending outside if we care about our gut health? What's the minimum effective dose?
Dr. Robin Chutkan
Yeah, I have to be honest, I'm just making this up because we don't have studies that are sort of scientifically showing that. But I think if you can get outside for an hour, that would be great. But really, if you can literally just open a window that still does something and let some fresh air in. So, you know the ideal, sure, go roam around in the woods for hours at a time. But if you can sit outside for a few minutes, if you can open a window in your car or your home, it does actually make a difference.
Dan Harris
Even in the city?
Dr. Robin Chutkan
Even in the city. Now, unfortunately, we have other studies showing that there is a proportional risk of allergies in cities. The more glass and concrete there is which is sort of a sign of urbanization. Right. So the more sort of urban your dwelling, with lots of glass and concrete, not a lot of nature, typically, the more allergies we have. We see high rates of asthma in places like New York City and Detroit compared to other parts of the world. But you can still get out. I mean, if you're in New York City, you can still go to Central park or some other area and benefit from that. We know that rurality is protective against autoimmune diseases. How do we know that? Because when we've looked at studies of kids who grow up on farms or exposed to the sort of rural countryside, whether they're farm animals or not, they have lower rates of autoimmune diseases like Crohn's and ulcerative colitis. If you live in a city, you can still benefit from that by visiting those areas, even if you're not exposed to that every day. So those exposures, particularly for children to more rural areas, seem to be really important for helping to train the immune system.
Dan Harris
We're going through dirt, sweat, veg. We've checked the dirt box. What's to know about sweat?
Dr. Robin Chutkan
I just want to add something to dirt, which is there's a wonderful book called Nature Deficit Disorder. I think it's Richard Louvy, and the tagline is last child in the woods. For anybody raising kids, or really for you raising yourself, it really talks about not just, okay, you're inside on screens, and that's a problem, but this idea of a nature deficit disorder and what it's doing to our bodies and our minds. Okay, we're moving along to sweat, and that just means moving your body. And we do have data on that. 30 minutes, ideally minimum of five times a week. And that's because the gut motility is really key for maintaining a healthy microbiome. So we don't want stagnation of the products of digestion and the microbes, because then you get overgrowth and things start to go awry. We need things moving. We need the microbes digesting the food, fermenting the food, and then moving out. A large component of our stool is dead bacteria, and we need that to happen. And so if you are sedentary and you're not sort of moving regularly, I always like to say, if you're not moving, neither are your bowels. So we know it's important not just for bowel regularity in the bathroom, but also for this idea of maintaining a healthy microbiome, which really relies on gut motility and ironically, Even though sort of Perry and Post pandemic, lots of people are working more remotely and have more time. I know I'm in my office a lot less and at home more, but I'm also sitting in front of a computer a lot more as opposed to being in my office. When I go out to the waiting room, I get a patient, I come back, I take him to the exam room, constantly moving and getting up and back from the hospital to my office. And now I'm spending really long blocks of time just sitting at a computer. And I can tell from a gut motility point of view that this isn't agreeing with me in simple things like tolerating less food because I eat and then I'm sitting for four or five hours and I feel it sitting there. The movement is really important. Not just the sweat, as in go do some sort of intense exercise for half an hour or an hour, but just a regular movement. It keeps things going. There's something called the migratory motor complex in the gut, the mmc, and that is important to be stimulated for proper gut motility and digestion. And, you know, sitting for long periods of time really kind of disrupts that.
Dan Harris
I mean, the case for exercise just gets stronger all the time. I'm a big believer. Okay, vegetables. And this is basically your shorthand for diet.
Dr. Robin Chutkan
For diet for fiber. Yeah. So in 2018 or 19, there was a study done called the American Gut Project, and this was the largest study ever done, looking at the human microbiome and asking the basic question, what does it take to create a healthy microbiome? It was done by Rob Knight, who's a PhD, really brilliant microbiome researcher, and others. And they looked at over 10,000 people from over 40 different countries. And this is really important because a lot of the other microbiome studies looked at 20 white men in Olmsted County, Minnesota. And we extrapolated to the entire world from there. So this looked at men and women and older and young and different ethnic groups from 40 different countries. And what they found was that the single most predictive factor for a healthy microbiome was the number of different plant foods you ate in a week. And the interesting thing here, Dan, is that it didn't matter whether people identified as vegan or pescatarian or vegetarian. There were vegans who had really unhealthy microbiomes because they were eating fewer than 10 different plant foods per week. And they were omnivores who ate a very sort of animal protein heavy diet, but also ate tons of plant foods. And when I say 30 different plants, it's not 30 different vegetables. So that includes fruits, vegetables, nuts, seeds, whole grains, herbs, spices, all of it. And I always like to think about my husband's oatmeal in the morning. He makes oatmeal. He puts in it walnuts, pumpkin seeds, raisins, blueberries, shaved coconut, and that's six things plus the oats. And you could keep going. You could put in a little dash of cinnamon, all of that. You even get credit for a little bit of maple syrup. So if you think about a salad, and you're starting with a basic base of some maybe lettuce and cucumber, and you add tomatoes, and you add some pickled vegetables and some shaved Brussels sprouts and some carrots, just keep going. So really what I want people to think about is a variety, not the quantity. You can eat two strawberries, and you're getting lots of healthy nutrients and things like lycopene from the strawberry. So it's not about eating a massive salad. It's really about the variety and trying to throw some things in there. And again, some herbs, spices, all of that stuff is really important for creating diversity in the microbiome. So if we want to have a diverse microbiome, we need to eat a diverse diet. And that's why this 30 different plant foods is such an important recommendation.
Dan Harris
What are the three Bs?
Dr. Robin Chutkan
The three Bs are beans, broccoli, and berries. And that's just sort of my shorthand. I mean, it happened to be three things that I really like. But rather than thinking about, oh, you know, soluble fiber, insoluble fiber, inulin, all these different things, think of beans, think of berries, and think of broccoli or broccoli, like foods. If it's broccolini or if it's, you know, Brussels sprouts, that's close enough. But think about those dense, fibrous vegetables like the broccoli and the Brussels sprouts. And don't throw the stems away. That's where most of the fiber is. So you want to chop up those stems and make sure that you're eating them too. Cooked, sauteed, however you're doing them. The berries, any kind. And don't get hung up on frozen whatever. Just eat some berries. And, of course, beans, any sort of legume is really fantastic for the gut microbiome. And the reason these things are important is because they have large amounts of poorly digestible or indigestible fiber in them, and it's indigestible because it's not meant for us, it's meant for our gut microbes. And so when that fiber hits the colon, it gets fermented by bacteria into these short chain fatty acids. And short chain fatty acids are really important post metabolite, sometimes we call it a postbiotic, something that bacteria create and they help to maintain the lining of the gut. They help to balance our immune response so that we don't have an overblown response. And to show you how profound this is, Dan, there was a study out of UMass Amherst that was done in around 2021, right sort of middle of the pandemic. And it looked at a stool sample as a marker of COVID outcome. And it found that the proportion of healthy bacteria like Phaecalobacterium prosnitzii, which we see primarily in people eating a high fiber diet, regardless of whether they're fully vegan or not, just eating lots of fiber every day, high levels of that predicted Covid outcome with 92% accuracy. That's more accurate than all the lab data. You know, whether you have a comorbid disease, age, et cetera. So we can predict outcome as in mild infection, no infection, ventilator death. 92% accuracy based on what your microbiome looks like. And what your microbiome looks like is most profoundly impacted by what you're eating. I tell you, Dan, I struggle with this because I would see patients from all over and I think patients are like, oh, we're coming to see this fancy gastroenterologist and she's gonna crack the case. And I'm sitting there thinking, how do I make. Eat more vegetables, get out in nature and move your body. Sound like it was worth this trip from California, wherever it was, right? And by the way, could we throw out all these supplements you're taking and let's really reconsider the medicine cabinet. Cause you're on a lot of medications. Several of these might be disrupting your gut. So let's see if we can work with the prescribing doctor and figure out which of these are absolutely necessary. So that was always my challenge, right. Is how to make this stuff sound more enticing.
Dan Harris
Just some follow up questions you said before. I'm not trying to say you should never have chocolate, you should never have a glass of wine, et cetera, et cetera. You're selling us, I think, very effectively on the benefits of a healthy diet. How do we think, Think about cookies and pasta and bread dipped in olive oil and candy at the movies in this Context.
Dr. Robin Chutkan
Well, I think we have to separate foods. I mean, there are treat foods that are not ultra processed foods. And for anybody who's not familiar with the NOVA classification, N O V A, it doesn't stand for anything, it's not an acronym. But developed by Dr. Carlos Montero and his colleagues, it is a one to four classification for foods that goes from category one. These are pretty much unprocessed foods, they may be ground up or something, all the way through to category four, which are ultra processed foods. I did a podcast episode on this. Also sort of brief primer on ultra processed foods. And ultra processed foods are really problematic because they are messing up our gut, they are messing up our brains, they are associated with an increase in mortality. You are more likely to die if a significant proportion of the food you're eating are ultra processed foods. And in the US we're now at about 55%, about 55% of our calories are from ultra processed foods. And it's particularly a problem in children because we know that these edible food like substances, as I like to call them, are associated with issues around executive function, cognition, et cetera. And I have to say, you know, I'm super proud of people food Babe and Jillian Michaels and all these folks who are out there trying to get food dyes out, et cetera. But I want to also point out, like, I don't think a healthy Froot Loop is the answer. Like don't eat Froot Loops as your main food group once a year or something, you know, you have something, okay, it's a treat, I'm eating this. But putting in a different kind of food coloring into the fruit loop is not the answer. We have to recognize that Froot Loops are an ultra processed food no matter what is in them. And if you want a really great dive into that, Chris Van Tulleken's book Ultra Processed People is really fantastic. So I would put categories like the candy you're gonna get at the movie theater and the breakfast cereals like Froot Loops in a separate category from a really good bread that was made maybe by a local bakery or something. And the ingredients are all things that you would recognize. It's not a chemistry experiment. It is things like wheat and eggs and milk and so on. And if you don't have any issues with those, if you're not dairy intolerant or gluten intolerant, you know, a whole made loaf of bread that was made by somebody and not made in a factory, ideally, or not in a big factory. And in A big sort of industrial process is actually fine to eat. Or some ice cream that's not full of emulsifiers. But again, that's not your main food, right? That's a treat. But that's really different from the ultra processed stuff that is really not even recognizable as food. And I still love to think back to Michael Pollan's food rules. You know, eat food with less and few ingredients. Eat food that your grandmother would recognize as food. When I start reading these ingredients to people, I say to them, if I took you into a chemistry lab and I told your kid, open up, and I mixed in a beaker, all these different chemicals that you've never heard of and you certainly don't have in your kitchen, and I said, open up, they would run out of there. But a lot of these things are what we're feeding our kids. And it's because the front of the packet is all marketing. The front is like, oh, it's high fiber and it's low sugar. It's low sugar, but it's full of artificial sweeteners. So it's all this sort of advertising on the front, right? And then on the back is where you really need to pay attention to the actual ingredient list and you start seeing stuff. My rule of thumb is, if this is not an ingredient that you could possibly have in your kitchen or in your pantry somewhere, don't eat it.
Dan Harris
Here's the way I think about this, and I say this for your reaction. I've been deeply influenced by a woman named Evelyn Triboli, who's one of the progenitors of intuitive eating. And she was trained as a nutritionist. But her idea is that if you get too obsessed, which is something I did for much of my life in an orthorexic way, too obsessed with eating healthy, you're not listening to your body anymore. And so now, generally speaking, I. I know what's good for me, quote, unquote, and I eat a quite a healthy diet. But also, most days, I'll have a little dessert after dinner, and if I go to the movies with my son, which isn't that frequent, we'll have some candy. So it's kind of best of both worlds. I know what makes me feel good, and it's not candy and Oreos, but I don't rule them out entirely. And I live my life in a reasonably easeful way in this manner.
Dr. Robin Chutkan
100% agree. 100% agree. My daughter's in college up in Hanover, New Hampshire, and we usually fly, but sometimes there's a Road trip. One of the first things I do is I go buy a bag of Cheetos. Now I recognize, I don't even know what food group Cheetos come from. I mean, I think there's corn in there somewhere. But I recognize that Cheetos, they do not make up the mainstay of my diet. But a couple times a year, I am eating my bag of Cheetos happily on the road trip. So we have to live in the real world. And there is ice cream in our house, there is chocolate in our house, we eat that stuff. But the bulk of our diet are foods that actually don't have a long ingredient list on them or any ingredient list at all. So typical dinner would be lentils and brown rice and some sauteed spinach and maybe some chicken or fish for me. And not something coming out of a box that goes into a microwave. The long list of ingredients. So intuitive eating is exactly what we should be doing and listening to our bodies. But because the food landscape is really complicated now, in our parents generation, they went to the store, they picked up a pack of chicken, it was chicken. Now you pick up a pack of chicken, it could have 15 or 16 different ingredients in there. You know, you're at a sort of fast casual restaurant or fast food restaurant eating chicken, and the chicken has 17 ingredients in it. So one of the ways around this is really just to try and eat at home more, where you are buying the things to prepare the meal out of that don't have a long ingredient list. So you know that your chicken is just chicken, right? It's not injected with a whole bunch of other things. But it's challenging. You know, it's really hard. People are busy. There's lots of time and money spent making us think that these highly processed things are actually good for us. And you know, Dan, I think the people who do have food intolerances like lactose intolerance or gluten intolerance, they have a harder time because they're looking for gluten free things. And often the gluten free things are worse. They're full of emulsifiers to make it feel or taste like gluten. So what I tell my patients is if you have celiac disease or you are gluten intolerant, or you just decided you want to give it a try, not eating gluten and see how you you feel, don't buy anything that says gluten free on it because potatoes don't say gluten free and rice doesn't say gluten free. Those are just naturally gluten free things. So if you just veer towards the whole grains like quinoa or rice or oats or things like that, it's not like a gluten free pancake or gluten free cookies or that's when we really get into trouble, when we start trying to create a version or artificial sweeteners like we talked about with the soda earlier. So the idea is if you are diabetic or you're struggling with weight and you want to have less sugar, have less sugar but don't have something artificially sweetened and have a little sugar but put less of it in. So really try to stir people away from these sort of synthetic artificial versions of actual food that from a marketing point of view seem really appealing but are really sort of messing up our kids chemistry in lots of different ways. Some known and some unknown.
Dan Harris
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Dr. Robin Chutkan
Turn around and take a look. Did you turn around and take a look today, Dan?
Dan Harris
Yes, because I prepared for this podcast and I knew you were going to.
Dr. Robin Chutkan
Ask me that question. And what do you have to tell me?
Dan Harris
Oh my God. Am I doing this on. On. On in public?
Dr. Robin Chutkan
Well, you don't have to show us. You just have to tell us.
Dan Harris
Based on what I read from you about what you want to be seeing.
Dr. Robin Chutkan
I believe I saw that you have achieved stool nirvana. I believe it. I think you have. I think you have. You. You look like you have.
Dan Harris
Thank you. I Appreciate that. I don't know how what that means, but sure.
Dr. Robin Chutkan
So a nice brown color, like not too light, not like sort of that chocolatey brown. Veering towards a darker brown.
Dan Harris
Yep.
Dr. Robin Chutkan
Nice. Good width. I mean, maybe not quite the width of your arm, but like good heft to it. Banana. At least a banana type diameter.
Dan Harris
I don't think so.
Dr. Robin Chutkan
Not quite a banana.
Dan Harris
Banana type diameter. How does that even come out?
Dr. Robin Chutkan
That actually leads to the conversation around consistency. So we were talking at the top of the hour with your producer about the Bristol stool scale, one through seven, with one being really small, hard lumps. And then as you get down into five, six, seven, more loose, into just sort of purely on form stool. So ideally, if you're somewhere around a 3, 4, 5, the stool has some bulk to it, but it still passes out because it's not hard and at the same time it's got form to it. It doesn't fall into the bowl and sort of disappear. But you know, really just the fact that you are looking is fantastic and kind of like the intuitive eating. I love the idea of intuitive pooping, which I'm going to give you credit for that. It doesn't have to be like a fantastic. A bowel movement champion every time. First of all, you're even going regularly, like, that's important. And that sounds like that's the case. And it's got a good color, it's coming out, it's not painful, it's not falling apart. It's not also looking super odd or the odor. I mean, nobody's stool. And I've been up inside thousands of colons and have many pictures of people's bowel movements on my phone that they have generously shared with me. HIPAA protect it, of course. And I'll tell you that nobody's stool smells fantastic. But you know, when your stool is off, like, if you've ever had food poisoning or you've just been like eating terribly, you know, Right. You know what the regular odor is. And you know, like. And this leads me to this predicament I have all the time, which is, you know, for dentists, like, they have to show up with like a beautiful grill, right? Dentists have to have really good teeth because people walk into their office, they don't want to see a dentist with like crooked yellow teeth. And dermatologists, that's. Oh, that's a lot of pressure. You walk in, you know, you want the dermatologist. It's supposed to look all like smooth and flawless skin. But people walk into my Office. They don't know what my bowel movements look like. I mean, they happen to look great, but they don't know. So here's a problem I have and my poo pride. If I am somewhere like this yoga studio I love down dog yoga in D.C. and I'm there waiting for the class, and I go into the bathroom, and let's just say I go into the bathroom to pee or wash my hands, but somebody before me has been in there, and they are not experiencing stool nirvana. They have, like, some horrendously foul stool, and maybe it's even left some marks in the toilet. I mean, really bad situation, terrible odor. And I come out, then the person who's going in next after me, I want them to know that is not my stuff. That is not. I did not do that. And I. It seems so foolish, right? Cause, like, what do you care? But that's a pride I have. Maybe like with a dermatologist skin. It's to the point, Dan, where I have gone to use the bathroom and I'm come out, I'm like, no. Because I cannot have this line of people behind me. And like, there's somebody from yoga, my friend Wolfgang, or somebody I know right behind me. He cannot go in here thinking that this is my poo situation. So this is my poo pride that I struggle with.
Dan Harris
Setting aside your situation for just a second, it's gonna smell bad. But if it smells like, so foul that it's unusual, that's a bad sign.
Dr. Robin Chutkan
Yeah, that's a bad sign. And that doesn't necessarily mean, you know, you have a parasite or something terrible, but it could mean that you're eating more processed meats, for example, things like bacon and sausages and deli meat that sometimes contain compounds that will give it a rotten egg type smell. There are things that I know, I eat a lot of beans, and beans can give you gas, and so the gas itself is not necessarily a problem.
Dan Harris
But.
Dr. Robin Chutkan
But if the stool itself smells really off, if you've been on antibiotics, sometimes that can affect the odor. Certain supplements, a lot of the supplements we talk about that people are taking that are not that great for them can change your odor. So it's important to really pay attention to that. And the most important thing that you're looking for is blood in the stool. Because blood in the stool, while it's often something benign like a hemorrhoid or a fissure, blood in the stool can also be a sign of colon cancer. And we're seeing more and more colon cancer in young people, even though we've moved that age of screening from 50 to 45 for everyone, we're seeing colon cancer in teenagers, in people in their 20s and 30s. And so if you have a change in your bowel habits, particularly one that's not explained by a dietary change, with a change in the consistency of the stool, the size of the stool, the color, the shape, or anything that looks like blood, you definitely want to get that evaluated.
Dan Harris
How many times a day should we be moving the bowels?
Dr. Robin Chutkan
At least once. Our GI definition of constipation from the gastroenterology field says fewer than three times a week is constipation. But really we eat every day. We should be having a bowel movement every day. That's sort of a generous definition that if you are going four times a week, you're not constipated. But what we're seeing is sort of the modern day version of constipation is something called incomplete evacuation, which is you go, but you are sorely disappointed by what's coming out. You go, but only a little bit comes out and you can feel that there's more in there waiting to come out. I liken it to insomnia because I think the modern day version of insomnia is you fall asleep, but then you wake up and you can't go back to sleep. Right. So it's not that you don't fall asleep, it's that you're waking up and you can't go back to sleep. So again, it's not that you're not having a bowel movement, but it's incomplete and it's stingy.
Dan Harris
So if you're having bowel movements three or four times a day, that might be a problem because each of them is insufficient.
Dr. Robin Chutkan
Exactly. Or it may be that, particularly if the stool is loose or softer, it may be because you are not reabsorbing all the water from the colon back in to result in a formed stool, firmer stool. And that can sometimes be a sign of things like colitis, of inflammation in the colon. So particularly a change if you eat a really high fiber diet and you exercise a lot and you stay hydrated and you move your bowels a couple times a day and you always have and you feel absolutely fine, generally not a problem. But if you have been sort of a one a day kind of person and now you're going two or three times a day, and particularly if there's a change in the stool consistency, that's definitely something that you should be looking into. And it doesn't necessarily mean it's something serious like colitis. It could be a food intolerance. It could be that now you're not tolerating dairy as well.
Dan Harris
You mentioned bloat earlier. What is that, and why is it important?
Dr. Robin Chutkan
Bloat refers to abnormal distention. Generally, we're talking about the abdomen when we talk about bloating. And that abnormal distension can be with any sort of air or gas. It can be with liquid, or it can be something solid. And so one of the things that I'm frequently trying to help people with is distinguishing between is this belly fat or bloat. And the key distinction there is that belly fat doesn't come and go, right? So I'll tell people, take a tape measure, measure your abdominal girth in the morning, in the evening, for several days. And if you see that number's not really changing, that's probably that you've put on more weight around your midsection. Belly fat, if you're seeing a variation, you know, couple inches difference between morning or evening or from day to day, that's more bloating. But most people can tell, you know, they can tell belly fat from bloating. I'll tell you, Dan, I would say somewhere north of 50%, probably 60 or 70%, of bloating is due to constipation, is that somebody's just blocked down below. There's a wad of stool down in the colon that is preventing that gas from escaping. And a lot of times people will say, well, I'm not constipated. I go every day. But again, it's an incomplete movement. They're kind of blocking the passage of the gas. So the first thing I generally start with when somebody comes in who's bloated is I really work on a good bowel regimen, having, like, a really big complete evacuation every day. And I would say about half the time, the bloating gets better, and then the other half, we have to look at things like, is this a side effect of a medication? Is it an intolerance to a food you're eating? Is it a motility issue? Do you have a fibroid that's sort of pushing on your colon and blocking things? There's medicine cabinet, there's physiology, there's hormonal stuff. With the thyroid, there are anatomical differences. I wrote a whole book about bloating called The Bloat Cure 101 Natural Solutions for Real and Lasting Relief. It's alphabetical for easy access, but that's just A sort of quick compendium. Each one of those things is a page. But if you're trying to be a bloat detective and figure out, okay, could I have an underactive thyroid? Is it something I'm eating? Is this an ovarian issue? It's a great little resource to try and help you figure out where your bloat's coming from.
Dan Harris
Just going to sneak in at one or two more questions before we run out of time here. Beans. You were just talking about gas, and that got me thinking about beans. I was a vegan for five years. That involved eating a lot of beans. I don't actually like beans that much, and they really do disagree with me. And my family was not happy with me and the beans. So how important are beans? Do we all have to eat them? And if we do eat them and they give us gas, what do we do about that?
Dr. Robin Chutkan
There are a couple things, and I really want to distinguish between what I call good gas and bad gas. So bad gas is like food poisoning, rotavirus infection. It's really typically not just foul, but it is painful a lot of the time and different. Or lactose intolerance, where, you know, you have dairy and there's terrible gas and you have loose stools and you feel really sick. The gas from beans is because the fiber in beans is poorly digestible. As I said, it's really there to feed our microbes. And we lack the enzyme called alpha1 galactosidase, that can really break that down. So a simple thing to do is to take a little bit of that enzyme. You can get it in the form of something called beano. There are other forms, too. You can also soak the beans overnight. Ahead of time, you can put in a sea vegetable like kombu. But it's pretty simple. And there's not really any downside I can think of of taking something like beano, and that provides an enzyme. It helps to sort of break that down. But there are other things you can.
Dan Harris
Do before the meal.
Dr. Robin Chutkan
Yeah, before or right after. But ideally before, you can eat less beans. And then there's some, like lentils, maybe not as gas producing for you as black beans. So you could try different ones, smaller portions. But to some extent, there's no completely getting around that for most people because, again, those beans are feeding your gut bacteria and the gas you're experiencing is a side effect of the fermentation process. And, you know, hopefully you've been married long enough and your family is sufficiently fond of you that they're not going to banish you completely, but yeah, my husband was vegan for quite a few years also, and we still tend to eat a lot of lentils, a lot of chickpeas. Yeah, there can be some impressive gas as a result of that, that's for sure.
Dan Harris
Supplements, we've been running down supplements in the course of this conversation. Are there any good supplements that we should consider?
Dr. Robin Chutkan
There are what I call digestive aids that can be really helpful for people. So, for example, fiber, I'm always suggesting, oh, you know, drink a green smoothie, have some beans, brown rice, kale salad, all of these things. But not everybody is able to get in as much fiber as they need all the time, every day. So fiber supplements like ground psyllium husk, P S Y L L I U M psyllium, which is ground up fiber from the plantago vato plant, that can be really fantastic for helping to bulk the stool. And also for people who don't tolerate the psyllium husk as well, acacia fiber from the acacia tree can also be helpful. So those are fiber supplements that I frequently use in my patients. Magnesium supplements can be helpful for relaxation, which is sort of the nice word for having a bowel movement. I don't think magnesium is magic has been suggested. I don't think it's gonna fully relax you and make you sleep and heal your gut. But a little magnesium in the evening, particularly when combined with a little psyllium husk or acacia fiber in the morning, can sometimes be just what people need to get them over the hump and have a really nice bowel movement in the morning. So those are things I recommend for patients all the time. The other thing, there are some probiotics. We don't really have data that the average person benefits from taking a probiotic any more than they do from taking a vitamin. But there are specific cases post food poisoning, post gastroenteritis. I see a lot of patients with autoimmune diseases like Crohn's disease and ulcerative colitis. And the probiotic I recommend, visbiome, has been clinically studied in over 100 clinical studies and shown to be beneficial. It has a medical food label on it from the fda. But for the average person going in and buying a probiotic off the shelf, you are better off buying a little sauerkraut from the farmer's market or doing a little dirt sweat veg. But there are certainly probiotics that are powerful combinations of several different strains that can help in specific conditions, whether it's a Traveler's diarrhea, irritable bowel syndrome, people with inflammatory bowel disease. So I really recommend that people would work with their healthcare practitioner to find something. And usually, Dan, not necessarily the one somebody is selling that may not be the one. So maybe the gastroenterologist asks them what they recommend that's not the one. Like, oh, I have it right here on my shelf. Let me sell this to you. Because most of those probiotics off the shelf, they don't have enough live bacteria, what we call the colony forming units, the cfu. They don't have enough strains, or they're not really doing anything. You're just pooing it right out. And while you could argue, well, that's not necessarily harmful, the problem is I think it lulls people into this false sense of security that they're doing what they need to do, when really what they need to do is probably pay a little more attention to their diet. So that's also my beef with a lot of the supplements and the powders and so on is like, you think you are nutritionally replete because you're taking this stuff and you're sort of neglecting doing the real work with a diet.
Dan Harris
Dr. Chutkan, before I let you go, can you just remind everybody of the names of your books and your podcast and any other stuff you've put out into the world that we should know about.
Dr. Robin Chutkan
I will. Thank you so much. So, Gut Bliss first book. This is sort of, you know, if you want to be a medical detective and learn everything you can about the digestive tract and your gallbladder and colon. Gut Bliss second book, the Microbiome Solution. Very different kind of hair day on this one. That took a lot of work, but this is really all about the gut microbiome and the involvement of the microbiome with autoimmune disease, with mental health, et cetera. So that's much more an in depth sort of scientific view. The Microbiome, the Bloat Cure, a Quickie, 101 natural solutions for Real and Lasting Relief. And then the last one, and I have to say, probably my favorite, the Antiviral gut. This book was very difficult to write because I wrote it during the pandemic. It came out in 2022, and I would wake up and there'd be 27 new research papers on the chapter I just wrote the day before. But the basic theme for that is the idea that our digestive tracts are not just organs for digestion. They are our main defensive organ in the body. They secrete acid that helps to denature and sort of neutralize viruses. The gut lining protects stuff in our gut from seeping into the rest of our body. The microbiome very much involved in our immune system, et cetera. So it's really reframing the gut in the sense of it being a more defensive organ and an important part of your immune system. The podcast is the Gut Bliss Podcast, and I'm so delighted to have the opportunity to share with you. I have to tell people a quick story about you. Not your bowel movements, but about you. Gut Bliss had just come out in 2013. 10% happier. See, I have it right on my shelf. I even have a place marked that I was looking at recently. 10% happier had just come out right? Recently. Around that time.
Dan Harris
Yeah, 2014. Yeah. Yeah.
Dr. Robin Chutkan
So we were all on our way. That was where I met Rich Roll, who's continued to be a wonderful friend in the Sakara life. Ladies Whitney and Daniel and so many wonderful people. So we're all on our way to Miraval for this grand experiment, Mind Body Green, of getting all these folks together. Joe Cross. Joe and the Juicer, still really good friends with all these folks. And I saw that you and I were speaking on the same day. I saw your name and I saw your book. So I was like, oh, I'm gonna read his book on the way there. Cause I don't really know his story. And this is a really intriguing title, 10% happier. So I read the book, and I think I read it on the plane on the way to Arizona, and I. And, you know, it's a very accessible book. It's a quick read. And I remember thinking, this guy is an asshole. He's a total dick. Like, I can't believe he's speaking at this conference. Like, he sounds just horrible and, you know, so full of himself. And then I got to the conference and we didn't interact a lot, but we interacted enough. I mean, I was there for your talk and. And I was like, he's a really nice guy. He is not an asshole. This is so. I just want to tell you, first impressions can be misleading. Have other people said that they read this book and they thought you were not that nice a person from the book?
Dan Harris
No, it's usually the other way around. They read the book, they love the book, and then they meet me and are disappointed?
Dr. Robin Chutkan
No, no, I. I loved the book. I just thought you were, like, a little bit of an asshole from the book. I had the opposite. Yeah, I met you and I was like, oh, he's really nice and he's not full of himself at all. And not to overuse the word, but he's really authentic. And I think what you're trying to do, you know, and I watched the episode and I could sort of feel it like you're this big thing happened and for anybody who hasn't watched it, go watch it. But you are trying to figure out like, how can I bring as many people along with me on this journey for as little as possible? I mean, we all have to make a living, right? But how can I focus on being of support and being of service rather than just making as much money as I can? I thought it was so lovely and I subscribed.
Dan Harris
Thank you. I appreciate that and I appreciate your time today. Yeah, I learned a lot. So thank you very much.
Dr. Robin Chutkan
I'll be expecting those who pictures.
Dan Harris
That's not in my inbox, but sure. Thanks again to Dr. Robin Chutkan. Awesome to talk to her. I learned a ton there. We've done some episodes that are related to what you heard me discuss with Dr. Chutkan in this episode, and I'm going to drop some links in the show notes if you want to go deeper on this. They include my conversations with The Nutritional Psychiatrist Dr. Uma Naidu, a three three part series I did with Dr. Keltner, the UC Berkeley professor, on the impact of nature on your physiology and psychology, and then I'm also going to drop a link to the career Earthquake episodes. Two things before I go. First, just a reminder that for this and every episode we're doing this month during our Get Fit Sanely series, we've got a bespoke companion meditation crafted by my friend, friend and the great Dharma teacher Cara Lai. Today's guided meditation is called when youn Want to Eat yout Feelings. And it's all about how to eat mindfully instead of mindlessly. I have been working on mindful eating for many years. It is a huge challenge, but absolutely worth it. So go over to danharris.com and become a paid subscriber if you want that meditation in your podcast feed or your inbox. Not for nothing, if you become a paid subscriber, you'll also be supporting me and my team as we launch our new little business. Lots of exciting stuff. Second thing I want to do before I let you go is I want to thank everybody who worked so hard to make this show. Our producers are Tara Anderson, Caroline Keenan and Eleanor Vasily. Our recording and engineering is handled by the great folks over at Pod People, Lauren Smith is our managing producer. Marissa Schneiderman is our our senior producer. DJ Kashmir is our executive producer. And Nick Thorburn of the band Islands wrote our theme. Hi, Zoe Saldana. Welcome to T Mobile. Here's your new iPhone 16 Pro on us.
Dr. Robin Chutkan
Thanks. And here's my old phone to trade in.
Dan Harris
You don't need a trade in. When you switch to T Mobile, we'll give you a new iPhone 16 Pro. Plus we'll help you pay off your old Phone up to 800 bucks and you still get to keep it.
Dr. Robin Chutkan
There's always a trade in.
Dan Harris
Not right now. At T Mobile.
Dr. Robin Chutkan
I feel like I have to give you something in return for karma.
Dan Harris
That's okay.
Dr. Robin Chutkan
I don't really have much in my purse. Oh, let's see. Hand sanitizer. It's lavender.
Dan Harris
I'm good.
Dr. Robin Chutkan
Seriously. Let me check this pocket. Oh, mints.
Dan Harris
Really, I'm fine.
Dr. Robin Chutkan
Oh, I have raisins. I'm a mom. Wait, wait one sec. I've got cupcakes in the car. It's our best iPhone offer ever. Switch to T Mobile. Get a new iPhone 16 Pro. With Apple intelligence on us, no trade in needed.
Dan Harris
We'll even pay off your Phone up.
Dr. Robin Chutkan
To 800 bucks with 24 monthly bill credits. New line, 100 plus a month on.
Dan Harris
Experience beyond finance agreement.
Dr. Robin Chutkan
$999.99 and qualifying.
Dan Harris
Boarded for well qualified plus tax and 10 connection charge. Payout via virtual prepaid card. Allow 15 days credits and imbalance due if you pay off earlier.
Dr. Robin Chutkan
Cancel see T mobile dot com.
Podcast Summary: "The Science of Gut Health | Dr. Robynne Chutkan"
10% Happier with Dan Harris
Host: Dan Harris
Guest: Dr. Robynne Chutkan, Board-Certified Gastroenterologist & Author
Release Date: June 16, 2025
Dan Harris opens the episode by emphasizing the profound impact gut health has on overall well-being, particularly mental health. He introduces Dr. Robynne Chutkan, a leading expert in gut health, who shares valuable insights without promoting any supplements, instead providing practical tools for enhancing gut and brain health.
Dr. Chutkan delves into the gut-brain axis, explaining it as a bidirectional communication network involving nerves, hormones, and immune signals. She highlights how the gut microbiome regulates neurotransmitters like serotonin, influencing mood and cognition.
Dr. Chutkan [08:33]: "The gut is literally the engine that drives everything... even if you're eating a super healthy diet, if the gut isn't optimized, those nutrients aren't getting absorbed properly."
The microbiome comprises all microorganisms living in and on our bodies, predominantly in the gut. Dr. Chutkan explains that the microbiome includes bacteria, viruses, fungi, and more, totaling about three to four pounds and surpassing human cells in number.
Dr. Chutkan [15:38]: "The microbiome refers to all the organisms that live in and on our bodies, mostly in our gut... more microbes than humans."
Dr. Chutkan provides a comprehensive overview of the digestive system, detailing each component's role:
Dr. Chutkan [18:23]: "The digestive system really encompasses from our mouth to our anus... each part has a specialized function."
A significant portion of the conversation addresses the prevalence of dubious supplements aimed at improving gut health. Dr. Chutkan warns against relying on over-the-counter supplements without scientific backing, noting that many can disrupt the gut lining and microbiome.
Dr. Chutkan [27:19]: "There is so much selling and this idea of hacking... a lot of these things that they're taking are actually part of the problem."
Dan shares his personal struggle with acid reflux, prompting a detailed discussion on its management. Dr. Chutkan emphasizes lifestyle modifications over proton pump inhibitors (PPIs), which can disrupt the gut's pH balance and increase infection risks.
Dr. Chutkan [35:46]: "The foundation of treating reflux is lifestyle modification... how much coffee am I drinking, how much alcohol am I drinking, how much chocolate am I eating."
Dr. Chutkan introduces her Dirt, Sweat, Veg framework, outlining three essential practices for maintaining a healthy gut:
Dr. Chutkan [41:23]: "Exposure to nature... just being outside in nature is very replenishing to our microbiome."
Dr. Chutkan [48:55]: "Sweat means moving your body... 30 minutes, ideally minimum of five times a week."
Dr. Chutkan [51:27]: "The single most predictive factor for a healthy microbiome was the number of different plant foods you ate in a week."
Understanding your stool is a key indicator of gut health. Dr. Chutkan introduces the Bristol Stool Scale, recommending regular bowel movements with a consistency of type 3-5 for optimal health.
Dr. Chutkan [66:36]: "A nice brown color, like not too light... good width... banana type diameter."
Distinguishing between bloating and persistent belly fat is crucial. Bloating often fluctuates based on diet and gut motility, whereas belly fat remains consistent.
Dr. Chutkan [74:28]: "Bloat refers to abnormal distention... belly fat doesn't come and go, but bloat does."
Not all gas is harmful. Gas resulting from healthy fermentation by gut bacteria is a sign of a thriving microbiome, whereas foul-smelling or painful gas may indicate issues like food intolerances or infections.
Dr. Chutkan [77:10]: "There are good gas and bad gas. Bad gas is like food poisoning... Gas from beans is because the fiber is poorly digestible."
While Dr. Chutkan advises caution with supplements, she acknowledges that certain digestive aids can be beneficial:
Dr. Chutkan [79:07]: "Fiber supplements like ground psyllium husk can be fantastic for helping to bulk the stool."
Dr. Chutkan and Dan discuss the balance between maintaining a healthy diet and allowing indulgences. Emphasizing intuitive eating, they advocate for flexibility and listening to one’s body while avoiding highly processed foods.
Dr. Chutkan [61:10]: "Intuitive eating is exactly what we should be doing... listen to your bodies."
Dr. Chutkan highlights her books and podcast for listeners seeking more in-depth knowledge:
She encourages listeners to explore these resources for comprehensive strategies to improve gut health.
Dr. Robin Chutkan [08:33]: "The gut is literally the engine that drives everything... even if you're eating a super healthy diet, if the gut isn't optimized, those nutrients aren't getting absorbed properly."
Dr. Robin Chutkan [15:38]: "The microbiome refers to all the organisms that live in and on our bodies, mostly in our gut... more microbes than humans."
Dr. Robin Chutkan [27:19]: "There is so much selling and this idea of hacking... a lot of these things that they're taking are actually part of the problem."
Dr. Robin Chutkan [51:27]: "The single most predictive factor for a healthy microbiome was the number of different plant foods you ate in a week."
Dr. Robin Chutkan [74:28]: "Bloat refers to abnormal distention... belly fat doesn't come and go, but bloat does."
Prioritize Gut Health: Recognize the central role of the gut in overall and mental health.
Adopt the Dirt, Sweat, Veg Framework: Incorporate nature exposure, regular physical activity, and a diverse plant-based diet into daily routines.
Be Wary of Unverified Supplements: Focus on natural ways to support the gut rather than relying on over-the-counter gimmicks.
Monitor Bowel Movements: Use the Bristol Stool Scale and other indicators to assess gut health regularly.
Embrace Intuitive Eating: Balance healthy eating with occasional indulgences to maintain a sustainable diet.
Dr. Robynne Chutkan’s Books:
Podcast: The Gut Bliss Podcast
Additional Episodes:
By integrating these insights and practical strategies, listeners can take actionable steps toward enhancing their gut health, thereby supporting their mental and overall well-being.