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A
I'm Louise Nicola, and this is the Neuro experience. Like, what is toxic air? Like, how is it actually making you sick?
B
So what's the problem? So the biggest problem is how our homes are built. And why is indoor air five to ten times dirtier than outdoor air? Because outside we have sun, wind, rain, and trees. Nature's air filter.
A
And not, if you're in Manhattan, less, still better.
B
Outdoor is still better than indoor air by far.
A
Okay.
B
Because that outdoor air is what comes inside, and then it gets trapped in there. So if. If I think about rivers, if you have a flowing river, it's generally cleaner water. But if you have, like a stagnant pond, that's when you start getting algae and bacteria and the water starts getting really contaminated. So outdoor, the wind is like rivers. Then when you come inside, it's like a stagnant pond where there's very little airflow. So there's no sun, there's no wind, there's no trees. We completely left the nature outside. Our indoor environments are really just designed for energy efficiency and throw thermal comfort. So they're just not a healthy way to live. And then look at all the materials. Like, everything in a home was manufactured in a factory, wrapped up, and then it's in your place to off gas. So whether that's the carpets, the fire retardants in your furniture, the paints. VOCs are volatile organic compounds. So those chemicals are coming out of everything. Even babies. Pajamas are often sprayed in fire retardants. Now what? There's chemicals in everything. And then we trap it inside, and.
A
So those chemicals leech off. Like, can we actually talk about mold for a second? Because I actually went and did a. A total tox screen, and we were testing for heavy metals, and it was like 800 different types, by the way. I didn't know that you could do that. And I'm like, come on. Like, I'm. I live such a clean, healthy life, and it actually came back with high levels of something that I cannot even pronounce. And then when I looked it up, it actually made me sick. It comes from black mold, I think.
B
Stacky buttress.
A
I think. So, Yeah. I think it was that. And then also nickel. And I'm thinking to myself, how on earth. Yes, I live in. I live in Manhattan, so. And I live in a. Like, I live on Park Avenue, so it's an old building, but it's. It's very clean. I filter the air, so I don't know where it's come from or how it's Built up.
B
If you look at the average indoor air, there's typically about a million particles floating around at all times.
A
Okay.
B
Between.03 and 10 microns in size. This is everything from metals, bacteria, mold, allergens, pollen, insect parts, dust mites. If people took the average sample of air that they're breathing right now and you put it under a microscope, you would be shocked at what you're breathing all the time. And like, you know, the rubber from the tires, you gotta change your tires every few years. Where does the rubber go into your air? Every factory and smokestack. And even if you're not using chemicals, everyone who's using their, you know, bounce sheets in the dryer and the exhaust from their cars, all of that is going into the air. And our, our air is this shared container that we live in. It's like a giant fishbowl. So when it's being polluted or contaminated anywhere, what water is to fish, air is to people. So here we are navigating through the air and it's all getting in you. So we used to just think about the stuff being in you has like food or water. You breathe 17,000 times a day, almost 20,000 liters of air per day. So there's so much intake and input that you have no awareness of just by breathing it. And most people who take those total tox tests, like, it's a very alarmist style test. And if you think about, like, how it's kind of designed to scare and shock you. Yeah, you know, naturopaths and functional medicine docs are doing their best with the information they have, but they're running practices, they're meeting patients now often trying to also run social media accounts and do marketing and run a business. It's a lot. So mold, if you look at like the search volume of mold over the last 10 years, 10 years ago, even five, no one was going to a functional medicine doc for mold. Now all of a sudden, this new industry had to become mold experts. But they're not. They've never even removed mold. Once they take a couple courses, they get a couple tests, they learn as much as they can. So you go get a test and everybody has stuff in them. So you see some mycotoxins or some mold, and then sometimes they say, hey, go get your house tested too. So you get your house tested, you got the mold, and then you freak out. But you also have a sigh of relief because you're like, I know what's making me sick now. It must be the mold. And people start doing this investigative construction, deconstruction, ripping apart their home, looking for the mold. The thing is, there's mold everywhere. So when you test for mold, you test indoors and outdoors, because mold is omnipresent. It's just something that's in our environment and people are looking at it as if it's very black and white, like you got the mold. Whereas if everybody does a test, everybody has some amount, quite a bit of metals. If you're not drinking water and detoxing regularly, and even if you are, certain things, stick around. And when I would test homes for mold, this is really crazy. I could test at 9am, at 2pm and 7pm and get wildly different results. So when you're going in and getting a test, a spot check, it's very unlikely that it's accurate. It depends on the wind, the humidity, when it rained. So you think you're, like, assessing your home super objectively, but your home is a part of this bigger outdoor system, so a lot of the information, it's really hard to look at it and do a test and then usually what the the results are. It's like you need to take more supplements to detox things.
A
Correct. Activated charcoal, get into the sauna.
B
Yeah.
Host: Louisa Nicola
Guest: Mike Feldstein
Date: January 8, 2026
This episode of The Neuro Experience, hosted by Louisa Nicola, explores the hidden dangers of indoor air quality and its links to health and cognitive decline, including early signs of dementia. Louisa is joined by breathing and environmental expert Mike Feldstein, who unpacks why our modern homes contribute to toxic air exposure, how common testing for toxins and mold can be misleading, and what practical steps can be taken for protection and awareness.
Environmental Comparison:
Sources of Indoor Toxins:
Louisa’s Experience:
Mike’s Perspective:
Why Tests Can Be Misleading:
The abundance of at-home test kits and "alarmist" style used by some practitioners can exaggerate concerns.
Testing is often inconsistent:
Industry Trends:
Psychological Impact on Patients:
Reality Check:
On Modern Living:
On Shared Air:
On the Toxin Testing Industry:
On Mold Ubiquity:
The conversation is candid, problem-focused, and demystifies common fears around air quality and environmental toxins. Both Louisa and Mike take a practical, evidence-minded approach, with Mike pushing back against health industry alarmism while still emphasizing the importance of awareness regarding air quality.
This summary captures the key lessons and memorable exchanges from the first portion of this episode, guiding listeners to recommend critical timestamps and highlighting the balanced, investigative tone of the discussion.