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ZOE Science & Nutrition

The 4 breathing secrets that will transform your health today | James Nestor

58 min episode · 2 min read
·

Episode

58 min

Read time

2 min

Topics

Productivity, Health & Wellness, Science & Discovery

AI-Generated Summary

Key Takeaways

  • Nasal vs. mouth breathing: Breathing through the nose releases approximately six times more nitric oxide than mouth breathing. Nitric oxide acts as a vasodilator, expanding blood vessels and improving oxygen delivery throughout the body. Switching to default nasal breathing — including during moderate exercise up to zone three intensity — addresses roughly 70% of common breathing dysfunction immediately.
  • Mouth structure and airway size: Industrialized soft food diets have reduced jaw and palate size across generations. Research by Robert Corcini across 250 papers shows that within one generation of adopting processed food, 50% of a population develops crooked teeth — a direct indicator of a narrowed airway that increases snoring, congestion, and sleep apnea risk.
  • Snoring as a health warning: Snoring signals the body is struggling to breathe during its primary recovery window. Oropharyngeal exercises — tongue and mouth movements that tone soft palate tissue — combined with nasal breathing habits and slower breath rates, can reduce snoring severity. Studies show asthmatics using similar slow-breathing techniques reduce bronchodilator use by around 50% within weeks.
  • Slow breathing protocol: Breathing at a five-count inhale and five-count exhale through the nose shifts the nervous system toward a calmer state within roughly 20 seconds. Setting a phone alarm twice daily for five-minute sessions of this paced breathing gradually lowers resting breath rate — from around 15 breaths per minute toward 10 — producing measurable reductions in baseline stress levels.
  • Mouth taping for nighttime nasal breathing: A postage-stamp-sized piece of surgical tape placed at the center of the lips trains the mouth to stay closed during sleep. Studies show approximately 55–60% of people open their mouths while sleeping. The protocol involves wearing tape for 10 minutes during waking activity, incrementally increasing duration before attempting overnight use.

What It Covers

James Nestor, author of *Breath*, explains how modern humans have developed dysfunctional breathing habits through postural changes, processed food diets, and mouth breathing. He outlines four evidence-based corrections — nasal breathing, slower breath rate, proper posture, and targeted exercises — that can measurably reduce snoring, asthma symptoms, and chronic stress.

Key Questions Answered

  • Nasal vs. mouth breathing: Breathing through the nose releases approximately six times more nitric oxide than mouth breathing. Nitric oxide acts as a vasodilator, expanding blood vessels and improving oxygen delivery throughout the body. Switching to default nasal breathing — including during moderate exercise up to zone three intensity — addresses roughly 70% of common breathing dysfunction immediately.
  • Mouth structure and airway size: Industrialized soft food diets have reduced jaw and palate size across generations. Research by Robert Corcini across 250 papers shows that within one generation of adopting processed food, 50% of a population develops crooked teeth — a direct indicator of a narrowed airway that increases snoring, congestion, and sleep apnea risk.
  • Snoring as a health warning: Snoring signals the body is struggling to breathe during its primary recovery window. Oropharyngeal exercises — tongue and mouth movements that tone soft palate tissue — combined with nasal breathing habits and slower breath rates, can reduce snoring severity. Studies show asthmatics using similar slow-breathing techniques reduce bronchodilator use by around 50% within weeks.
  • Slow breathing protocol: Breathing at a five-count inhale and five-count exhale through the nose shifts the nervous system toward a calmer state within roughly 20 seconds. Setting a phone alarm twice daily for five-minute sessions of this paced breathing gradually lowers resting breath rate — from around 15 breaths per minute toward 10 — producing measurable reductions in baseline stress levels.
  • Mouth taping for nighttime nasal breathing: A postage-stamp-sized piece of surgical tape placed at the center of the lips trains the mouth to stay closed during sleep. Studies show approximately 55–60% of people open their mouths while sleeping. The protocol involves wearing tape for 10 minutes during waking activity, incrementally increasing duration before attempting overnight use.

Notable Moment

During a controlled Stanford experiment, two participants who sealed their nostrils for ten days developed snoring of up to four hours nightly and sleep apnea within days — despite neither having these conditions previously. The experiment mirrored the physiological state of chronic mouth breathers who remain entirely unaware of the damage occurring.

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Episode Transcript

Welcome to ZOE Science and Nutrition, where world leading scientists explain how their research can improve your health. The experiment was simple, but deeply uncomfortable. Two healthy men deliberately interfered with the body's most basic behavior, breathing. Their noses were sealed shut for ten days. They inhaled and exhaled only through their mouths while researchers tracked markers of health. The changes were dramatic. Blood pressure climbed. Sleep became fragmented. Cognitive function dropped, stress hormones surged. Within days, their physiology began to resemble that of people decades older. But this wasn't an extreme stress test. It closely mirrors how many people breathe every night, unaware of the strain that it places on their body. In this episode, we sit down with investigative journalist, James Nestor, author of the international bestseller, Breath, the new science of a lost art. He shares the science and history of breathing and how it can subtly impact your health. By the end, you'll see breathing not as something automatic, but as a powerful biological lever hiding in plain sight, And you'll know exactly what to do to get your breathing back on track using simple exercises. James, thank you so much for joining me today. Thanks for having me. So we like to kick off our show here at Zoho with a rapid fire q and a with questions from our listeners. Are you willing to give it a go? I am. Good. And we have some very strict rules. You can say yes or no, or if you have to, a one sentence. Okay. Are most people breathing wrong? Yes. Did you once plug your nose with silicone for ten days in the name of science? Yes. Is breathing through your mouth healthy? No. Does mouth taping work? For some people. What's the biggest thing that people get wrong about breathing? They breathe too much. They breathe too much. Who knew that was a thing? Now if you're listening to this right now, obviously, you're breathing. I've been doing it all my life. And until about fifteen seconds ago, I never put any thought into it. But now I'm worrying that I'm doing it apparently too much, and our listeners, it sounds like, might be doing this as well. How did you first get interested in breathing? It wasn't something I set out to do journalistically. I was having a bunch of respiratory problems, and I wasn't finding any long term relief from them. I was getting bronchitis every year. I was getting mild pneumonia every year. And I noticed that my breathing was becoming more labored every year, even though I was eating the right food, sleeping eight hours a night, all that stuff. And finally, it got to the point where I was worried that I had a serious problem. Every time I went to the doctor, I was given antibiotics. This was before, of course, we knew what antibiotics do to your gut microbiome. And it wasn't until a doctor friend of …

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  • BreathRecommendedBy guest

    by James Nestor

    James Nestor, author of *Breath*, explains how modern humans have developed dysfunctional breathing habits through postural changes, processed food diets, and mouth breathing.

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