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Dave Asprey
Every time you reach for a healthy snack, you could be sabotaging your energy, focus and long term health. That's because even if you think it's healthy, it probably contains seed oils, which make up 20% of the average person's daily calories. And recent studies show seed oils can cause metabolic issues and inflammation in your body. Masa decided to do something about it. They created a delicious tortilla chip with just three three organic nixtamalized corn, sea salt and 100% grass fed beef tallow and no seed oils. This is one of the few times I'll eat corn because this corn is nixtamalized, which is a process that removes mycotoxins and anti nutrients. Masa chips don't only avoid all the bad stuff, they taste incredible too. Snacking on Masa chips is nothing like eating regular chips. They're crunchier, tastier and sturdier than other chips, so they won't break in your guac. With Masa, you feel satisfied, light and energetic with no crash, bloat or gross sluggishness afterwards. And an added bonus is that the beef tallow makes the chips much more satiating, so you won't find yourself uncontrollably binging and still feeling hungry afterwards. Ready to give Masa a try? Go to masachips.com daveasprey and use code daveasprey for 25% off your first order. That's M A S A chips.com daveasprey use code daveasprey.
You're going to love these chips Right now. Inside your body, there's a switch that keeps you young. When it's on, it cleans out the junk in your cells. It keeps your muscles strong and it gives you energy like you had in your 20s. But as you get older, the switch slowly turns off. And once it's off, everything starts breaking down. Your body stops working like it used to. You feel tired, weak, and out of energy. Even if you're trying to stay active all the time, you probably think it's because of age that your body's slowing down and there's nothing you can do about it. But here's what almost nobody knows. You can turn that switch back on. There's a specific compound your body needs to reactivate it, and only about 30 to 40% of us can produce that compound naturally. And even then, we don't make enough. In this video, I'll show you exactly what this compound is and how it flips the switch back on so you can finally feel like yourself. Again, before we talk about that secret compound, you need to understand what's actually happening inside your body right now and why it matters so much for healthy living. Living. You see, your body has almost 600 muscles that help you breathe, move your body and produce energy. But those muscles aren't just there to make you look good or to help you lift heavy things. Your muscles are actually the key to staying young and living longer. Doctors even call muscles the closest thing to the fountain of youth that we have. Researchers did a study that followed 2,200 middle aged adults for 44 years, and they discovered that good muscle strength was the strongest predictor of a long life. Even stronger than your weight, your diet, or how much you exercise. But why is muscle so important for staying younger? Because inside every cell in your muscles and your body, there are tiny little power plants called mitochondria. Think of them like the engine in your car. These little engines take the food you eat and the air you breathe, and.
They turn them into energy.
It's how you move, lift things, walk up stairs, and even play with your kids. When you were younger, those power plants were brand new. They were clean and pumping out energy like crazy. Your body was running on clean fuel.
And everything worked perfectly.
But as you get older, a drastic shift happens. Those little power plants inside your muscle cells start to break down because they get damaged from years of use, just like an old car engine that's been running for decades. So now your muscles are trying to run on half broken engines that are producing less and less energy every single day. And that's why you feel weaker even though you're still working out. That's why you get tired faster even though you're eating right. Your body isn't lazy. It's literally running out of power because the engines inside your cells are dying. Now, you might be wondering, if these mitochondria are so important, why doesn't your body just clean them out and replace them with new, young, healthy ones? Well, it's supposed to. Your body's actually designed with a cleaning system that does exactly that. It's been inside you your entire life, quietly doing its job. But almost nobody knows what it is, how it functions, and why it stops working. You've had this system since you were born. It's called mitophagy. It's the cellular process that goes into your cells, finds the damaged or unnecessary mitochondria and removes them. Then your body makes brand new mitochondria and suddenly you're running on clean energy again. When you were in your 20s and 30s, mitophagy was probably still working. Every single day. It was going through your cells, removing the broken mitochondria and replacing the new ones. Well, it was doing that if you weren't tired and eating the wrong stuff. And that's why you had so much energy back then. That's why your muscles recovered faster and you felt strong and alive, even if you stayed up all night. But as the years go by, mitophagy starts to slow down. By the time you hit your 40s or your 50s, it's not cleaning out the broken mitochondria as quickly, which means all that damaged junk just sits inside your cells, piling up year after year. This is where the real problem begins. Without that mitophagy working effectively, everything just keeps getting worse and worse. You feel it every single day. The tiredness, the weakness, and that feeling that your body just isn't responding like it used to. And here's the slippery slope. Because you're making less energy, you have even less energy for mitophagy. So the problem gets worse and worse. So how do you speed up mitophagy? How do you get it working right so it can remove the broken mitochondria and replace them with new ones? With one secret compound that only certain people are able to produce naturally. That compound has the power to re energize your cells from within, and it's called urolithin A. This is a compound that only 30 to 40% of people can make naturally. When you eat certain foods like pomegranates, berries, and some nuts, there are special nutrients in those foods that travel down to your gut. And only if you have a special kind of bacteria living in your gut can you make urolithin A out of those foods. It's like a little factory inside your GI tract that produces this compound naturally. So urlithin A goes into your muscle cells and activates mitophagy directly. It's the signal your body needs to start removing those damaged mitochondria and replacing them with fresh new ones. It literally turns the mitophagy switch back on. But 60 to 70% of us can't make this compound because we lack the bacteria in our guts. That's why so many people are walking around without this compound in their system. If you're one of the lucky ones who can make urolithin A naturally, you are not making enough of it consistently every day, because you would have to eat pounds of berries and pomegranate to get the amount of Urolithin A that you need in order to reverse the problem with mitophagy. So this is the crossroads you're standing at right now. You can keep living without this compound and watch your mitochondria continue to break down year after year, or you can find a way to get urolithinate into your system. To kick the mitophagy process back into high gear. You'll definitely choose option B. But how do you actually get this compound so you can experience it all yourself? The first thing people usually try is eating more foods that contain the nutrients your gut bacteria needs to make urolithin A. One of those nutrient rich foods is pomegranate, the pith and the inner peel of the pomegranate. Those bitter parts contain the building blocks of urlithin A, but you're not gonna eat them because they taste bad. Pomegranate juice is an alternative, but it typically has more than 30 grams of sugar per cup, and that's a ton. To get enough urolithin A from pomegranate juice to actually make a difference in your muscles, you'd have to drink about six cups every day. And you'd have to do that consistently for months before you'd see results. And you'd have an awful lot of sugar and you'd be poor because pomegranate juice is expensive. It just isn't effective. Plus, remember what we talked about earlier? 60 to 70% of people don't even have the right gut bacteria to make this conversion happen. So you could drink all that pomegranate juice and get all that sugar, and your body still wouldn't make enough urolithinate to flip that switch. But the sugar would age you. So what's the solution? Well, scientists figured out how to create urolithin A directly without needing your gut bacteria to do the work. They developed a supplement form of this compound that you can take, and it goes straight into your system, ready to use at levels far higher than you could reach with food. The only clinically tested version of this supplement is called Mitopure, and it took 10 years of research to make it. It contains a pure, bioavailable form of urolithin A that's been tested in multiple clinical studies over the last 15 plus years. The fact that they pioneered this research and they have very high quality is why I use mitopure every single day. In fact, they take a double dose. When people take mitopure, their bodies get a consistent, reliable dose of it, which means their cellular cleanup crew can actually start doing the work it's supposed to be doing. Mitopure gives you the exact amount of urolithin A that research shows makes a difference. If you're just eating some foods and hoping it converts, you're not going to get that. Now. This isn't some magic pill or a new compound that just showed up on the market last year. Scientists have been researching Urolithin a for over 15 years, and most of the research has been done in collaboration with one of the most respected scientific institutions in the world, the Swiss Federal Institute of Technology. There have been 11 human clinical trials completed, with a total of 25 ongoing, involving over 900 people who actually took Mitopure and had the results measured and documented. There have been more than 500 published studies on urolithin A and how it affects health. And the company that makes Mitopure holds more than 56 patents on their proprietary formulation because they've proven it works. You will not find a better studied supplement out there.
Right now, your body might be wasting energy on stress instead of healing. That's why your gut feels off, your brain feels dull, and your immune system keeps letting you down. What if you could switch your healing state back on without meds, stimulants or guesswork? Vibrant Blue Oil's parasympathetic essential oil blend is a powerful, non invasive way to activate your nervous system and shift your body into healing mode just through scent. A drop behind your ears can help switch off your stress response, calm inflammation and support digestion, detox and immune function. And it can even help clear up your stubborn brain fog. It's natural, easy to use, and thousands of happy customers already love it. And right now, the Human Upgrade Podcast listeners can grab a full size bottle for over 50% off@vibrantblues.com Dave that's vibrantblue oils.com Dave don't wait to start feeling like yourself again.
In clinical studies, people who took Mitopure saw their mitochondrial renewal increase by 40% after just 16 weeks. That means their bodies were cleaning out those damaged mitochondria and replacing them in new ones at a rate that was 40% higher than before they started taking mitopure. And this translates into meaningful results. Another study found that middle aged adults who took mitopure had a 12% improvement in muscle strength after four months of taking the supplement. And they didn't change their diet or exercise at all. That's right, 12% more muscle strength for not doing anything but taking Mitopure. So if you want to turn that switch back on and boost mitophagy. This is how you do it. But if you want to see the kind of results like muscle strength, the energy, the feeling of being younger again, then you need to combine this compound with something else, because there's a complete system that makes it all work even better. Taking mitopure to get urolithin A is powerful, but it's not the complete picture. Want to see the full transformation? The muscle strength, the energy, the feeling of being younger. You need to combine this compound with three other critical elements. The first element is resistance training. That means lifting weights, doing bodyweight exercises, or any kind of movement that challenges your muscles and makes them work harder. But you have to do a lot of it. You just have to do some of it. You don't need to spend two hours in the gym every day. The research shows that just two sessions a week of resistance training is enough to trigger this response. We're talking about 30 to 45 minutes twice a week if you do normal, or much less if you do optimized resistance training. The second element is protein. Your body needs protein to build those new power plants we've been talking about. Most people don't need enough protein, and you need even more after age 40, especially if you're trying to stay healthy by eating more vegetables and cutting back on meat, which is not how to stay healthy. The third element is sleep. This is the one most people overlook, but it might be the most powerful piece of the puzzle. When you're awake and moving around, your body's focused on keeping you going and dealing with whatever you're doing in the moment. But when you sleep, that's when your body shifts into repair mode and does all the deep maintenance work. When you put all of these pieces together, that's when your muscle strength comes back within four months. That's when you feel energy you haven't felt in years, and that's when you stay young at the cellular level. Now you know why your muscles have been getting weaker, even though you've been doing everything right. You know about the mitophagy process that's been slowing down for years, and you know exactly what it takes to speed it back up. You weren't born to just accept getting weaker. You were born with the ability to stay strong, to have energy and to feel young in your own body. That ability is still there. It's just been turned off. And now you know exactly how to turn it back on. So what are you going to do?
Podcast Disclaimer Narrator
A human upgrade. Formerly bulletproof radio was created and is hosted by Dave Asprey. The information contained in this podcast is provided for informational purposes only and is not intended for the purposes of diagnosing, treating, curing, or preventing any disease. Before using any products referenced on the podcast, consult with your healthcare provider carefully, read all labels and heed all directions and cautions that accompany the products. Information found or received through the podcast should not be used in place of a consultation or advice from a healthcare provider. If you suspect you have a medical problem or should you have any healthcare questions, please promptly call or see your healthcare provider. This podcast, including Dave Asprey and the producers, disclaim responsibility for any possible adverse effects from the use of information contained herein. Opinions of guests are their own and this podcast does not endorse or accept responsibility for statements made by guests. This podcast does not make any representations or warranties about guest qualifications or credibility. This podcast may contain paid endorsements and advertisements for products or services. Individuals on this podcast may have a direct or indirect financial interest in products or services referred to herein. This podcast is owned by Bulletproof Media.
Podcast: The Human Upgrade: Biohacking for Longevity & Performance
Host: Dave Asprey
Episode: Why Your Muscles Break Down After 40 (Do This To Reverse It) : 1412
Date: February 8, 2026
In this episode, Dave Asprey dives deep into the science behind age-related muscle loss—especially after 40—and introduces practical, science-backed strategies to reverse it. The central theme revolves around how mitochondrial health and the process of mitophagy are crucial for maintaining muscle strength and energy as we age. Dave reveals a "secret compound," urolithin A, that can reactivate the body’s natural muscle-cleaning systems, offering a pathway to more youthful energy and resilience.
The Role of Muscles in Longevity:
Muscles are described as “the closest thing to the fountain of youth that we have," with muscle strength being a stronger predictor of long life than weight, diet, or exercise habits.
Mitochondria as Cellular Power Plants:
Each muscle cell contains mitochondria that convert food and oxygen into energy. Over time, these "power plants" degrade, lowering cellular energy levels and causing fatigue and weakness.
Explaining Mitophagy:
Mitophagy is the body's cellular "clean-up" process, clearing out damaged mitochondria and replacing them with healthy ones. This system works well in youth but slows with age.
The Vicious Cycle:
As mitochondria break down, less energy is available for mitophagy itself, resulting in further cellular decline.
Urolithin A’s Role:
Urolithin A is a potent compound shown to activate mitophagy. Only 30–40% of people with specific gut bacteria can make this compound naturally from foods like pomegranates and certain berries.
Diet Isn’t Enough:
Eating pomegranate or berries is impractical because of gut bacteria variability and excessive sugar intake needed to reach effective dosages.
Supplementation Breakthrough: Mitopure:
Scientists developed a direct supplement (Mitopure) containing a bioavailable form of urolithin A, bypassing the need for gut bacteria.
Dave Asprey emphasizes that Mitopure is part of a broader system:
On the Real Problem with Aging Muscles:
“That's why you feel weaker even though you're still working out. That's why you get tired faster even though you're eating right. Your body isn't lazy. It's literally running out of power because the engines inside your cells are dying.”
— Dave Asprey [03:21]
On Mitophagy:
“You've had this system since you were born. It's called mitophagy. It's the cellular process that goes into your cells, finds the damaged or unnecessary mitochondria and removes them. Then your body makes brand new mitochondria and suddenly you're running on clean energy again.”
— Dave Asprey [03:45]
On Practical Limitations of Food-Based Solutions:
“You could drink all that pomegranate juice and get all that sugar, and your body still wouldn't make enough urolithin A to flip that switch. But the sugar would age you.”
— Dave Asprey [07:16]
On the Impact of Supplementation:
“People who took Mitopure saw their mitochondrial renewal increase by 40% after just 16 weeks. That means their bodies were cleaning out those damaged mitochondria and replacing them... at a rate that was 40% higher than before they started.”
— Dave Asprey [10:17]
Call to Action for Listeners:
“You weren't born to just accept getting weaker. You were born with the ability to stay strong, to have energy and to feel young in your own body. That ability is still there. It's just been turned off. And now you know exactly how to turn it back on.”
— Dave Asprey [12:28]
Dave Asprey delivers a concise, science-backed blueprint for reversing muscle breakdown after 40:
Bottom line: Muscle decline after 40 isn’t inevitable—you can flip your body’s cellular renewal switch back on and reclaim energy and strength with the right knowledge and actionable strategies.