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In this episode of the Broken Brain podcast, host Dhru Purohit speaks with Dr. Mark Burhenne, a dentist specializing in the connection between oral health and sleep apnea. Dr. Burhenne emphasizes that the mouth is a gateway to overall health and discusses his book, "The 8-Hour Sleep Paradox." He shares his journey in dentistry, including being fired early in his career for prioritizing patient care over production demands. Dr. Burhenne highlights the importance of recognizing sleep apnea, which affects 22 million Americans, often going undiagnosed. He explains that dentists can identify signs of sleep apnea much earlier than physicians by examining oral health indicators. He discusses the various factors contributing to sleep apnea, including jaw structure, mouth breathing, and the impact of modern diets on facial development. The conversation delves into the long-term health consequences of untreated sleep apnea, such as increased risks of Alzheimer's disease and other systemic health issues. Dr. Burhenne notes that sleep apnea can manifest in various forms, including in younger, healthier individuals, particularly women, who may experience mood disorders and TMJ issues related to sleep disturbances. Dr. Burhenne advocates for mouth taping as a simple method to encourage nasal breathing during sleep, which can improve overall health. He explains the physiological benefits of nasal breathing, including better oxygen regulation and reduced anxiety. The discussion also covers the importance of clean water, the potential risks of fluoride, and the role of diet in oral health. He stresses the need for regular dental check-ups to catch early signs of gum disease and other oral health issues, which can have systemic implications. Dr. Burhenne encourages listeners to be proactive about their sleep health, suggesting sleep studies for those who suspect they may have sleep apnea. He emphasizes the importance of building a supportive healthcare team to navigate treatment options effectively. In conclusion, Dr. Burhenne shares personal anecdotes of patients who have transformed their lives by addressing sleep issues, underscoring the profound impact of sleep on overall well-being. He invites listeners to explore his website, askthedentist.com, for resources and further information on improving sleep and oral health.

Breath can be a switch you flip on your biology, a power you can align with the body’s natural rhythms. In a line of Italian studies, prayers that exhale for five to six seconds and then slowly inhale produced a state of coherence across multiple systems, a pattern called coherent breathing. James Nestor traces this thread to predecessors of Wim Hof and to the Bon Buddhist tumo, a technique said to generate heat through controlled breath and metabolic modulation. He explains two versions: the traditional tumo, a slow, heat-generating process, and the commercialized “tumo light” with short breaths and muscular compression during breath holds that can trigger sweat even in cold. Nestor has practiced the latter, noting it can warm you instantly, while the slower form remains more guarded and esoteric. The conversation then dives into personal practice: Sudarshan Kriya opened Nestor’s eyes to the power of breath work, after years of respiratory infections and nights spent hearing himself breathe. He numerically cites the link between sleep-disordered breathing in kids and ADHD, arguing that many cases are breathing problems misdiagnosed as neurological, and urging parents to assess nasal breathing, mouth breathing, and snoring rather than defaulting to pills. Techniques center on becoming an obligate nasal breather and gradually extending the nasal approach into sleep, using aids like mouth tapes and Myotape to train lips shut at night. He relays his own dramatic breakthrough with sleep tape, and notes that many athletes and doctors are studying these patterns with growing interest. A central thread follows Nestor’s obsession with indoor air quality. He showcases a carbon dioxide monitor and outlines decades of studies showing cognitive performance dipping as indoor CO2 rises, with marked effects around 1,500 to 5,000 parts per million. He travels with monitors, records hotel air, and finds many green-certified buildings fail to deliver fresh air, often recirculating backwash. His practical advice: ensure windows open where possible, request rooms with ventilation, and, when unavoidable, use a monitor database to guide choices. He also shares metrics like the bolt score for CO2 tolerance, a quick nasal-breathing test that climbs with regular training, and praises diaphragmatic breathing and resistance devices for athletes. The conversation closes on writing, discipline, and the craft of turning years of notes into a cohesive narrative.

The interview focuses on sleep apnea, a significant oral health issue affecting 22 million Americans, many of whom remain undiagnosed. Dr. Mark Burhenne emphasizes that dentists can identify sleep apnea symptoms much earlier than physicians by examining various signs in the mouth and facial structure. He highlights the importance of recognizing sleep apnea in children and its potential long-term effects on brain development and overall health. Dr. Burhenne discusses the traditional view of sleep apnea, often associated with overweight older males, and introduces the broader spectrum of the condition, which can manifest in milder forms that are frequently overlooked. He explains that sleep apnea can begin at birth and is characterized by interruptions in breathing during sleep, leading to various health issues, including brain damage and increased risks of conditions like Alzheimer's. The conversation touches on the anatomical changes in jaw structure over generations, influenced by factors such as diet and breastfeeding, which contribute to the rising prevalence of sleep apnea. Dr. Burhenne notes that mouth breathing, often resulting from nasal obstructions, exacerbates sleep issues and can lead to dental problems like gum disease. He advocates for early screening for sleep disorders, suggesting that everyone should undergo a sleep study by age five or ten. The discussion also covers the importance of proper breathing techniques, including the benefits of nasal breathing over mouth breathing, and introduces the concept of mouth taping as a tool to encourage nasal breathing during sleep. Dr. Burhenne outlines a three-step plan for addressing sleep apnea: recognizing the potential for sleep disorders, exploring treatment options (including CPAP, oral appliances, and surgery), and verifying sleep quality through follow-up assessments. He emphasizes the need for patients to be proactive in their health care, advocating for collaboration among dental and medical professionals to improve outcomes for those suffering from sleep apnea. Overall, the interview highlights the critical connection between sleep health, oral health, and overall well-being, urging listeners to prioritize sleep as a fundamental aspect of their health.

Low blood flow is the primary brain imaging predictor of Alzheimer's disease, with factors such as hypertension, sedentary lifestyle, and obesity significantly impacting brain function. Inflammation, particularly from gum disease, is linked to brain and heart health, emphasizing the importance of oral hygiene. Genetics play a role, but understanding family risks can guide preventive measures. Head trauma and environmental toxins, including mold and chemicals, also contribute to brain health decline. The rise in autism is attributed to gene-environment interactions, highlighting the need for awareness of toxins in everyday products. The app "Think Dirty" helps users identify harmful personal care products, revealing the toxicity of common items. The epidemic of low vitamin D levels is exacerbated by excessive sun protection, leading to further health issues. Prioritizing brain health involves small, actionable habits, such as assessing daily choices for their impact on brain function. Personal stories, like that of an 83-year-old woman who transformed her life through simple changes, illustrate that improvement is possible at any age. Caffeine, marijuana, and alcohol are discouraged due to their negative effects on blood flow and brain health. Marijuana use, especially among adolescents, is linked to increased risks of mental health issues. The perception of marijuana's safety is challenged by research showing its detrimental effects on brain activity. Psilocybin and other psychedelics are viewed with caution, as their potential benefits must be weighed against risks, particularly in unregulated settings. The importance of sleep, particularly in children, is emphasized, as sleep apnea can lead to cognitive and behavioral issues. Breathing techniques can alleviate anxiety and improve overall brain function. Understanding individual brain types can personalize approaches to mental health and dietary choices, recognizing that different people respond uniquely to various diets. Obesity and diabetes are major risk factors for cognitive decline, with a significant portion of the population affected. The pandemic response has exacerbated health issues, leading to increased obesity rates. The food industry is criticized for promoting unhealthy diets, contributing to a cycle of poor health. Mental health is intertwined with physical health, and addressing both is crucial for overall well-being. The concept of "dragons of the past" refers to unresolved issues that affect mental health, such as feelings of insignificance or anxiety. Recognizing and addressing these underlying issues can lead to healthier behaviors and improved decision-making. Acknowledging mortality and preparing for it can enhance the quality of life and relationships. Overall, prioritizing brain health through informed choices and awareness of environmental factors is essential for long-term well-being.

Breathing is not a cure-all, but controlling dysfunctional breathing can help restore balance in the body. James Nestor discusses the recent surge in interest in breathwork, especially following the pandemic, highlighting that insights into breathing have existed for centuries yet remain underappreciated in modern society. He notes that both breathing and sleeping are often taken for granted, despite widespread issues like dysfunctional breathing and sleep disorders. Nestor emphasizes that many people seek complex solutions for health issues, overlooking the simplicity of proper breathing, eating, and sleeping. He points out that the medical industry often lacks financial incentives to promote breathing techniques, as there is little profit in natural health solutions. He argues that understanding and improving breathing can empower individuals to take charge of their health, especially as misinformation about nutrition and wellness has proliferated. Breathing is a direct link to the autonomic nervous system, influencing energy levels and overall health. Nestor explains that dysfunctional breathing can lead to chronic conditions like asthma and diabetes, as it affects stress levels and inflammation. He shares research showing that slow, controlled breathing can alleviate symptoms of asthma and panic attacks. Nestor also discusses the importance of nasal breathing, especially during sleep, and offers practical tips for improving sleep quality, such as using sleep tape and adjusting bed height. He highlights the benefits of breathing techniques for athletes, noting that proper breathing can enhance performance and recovery. Finally, Nestor reflects on the ongoing research in breathing science and his commitment to sharing this knowledge, encouraging people to explore the profound effects of breath on health and well-being.

James Nestor discusses how the human habit of dysfunctional breathing underpins a wide range of health issues, emphasizing that breathing is a continuous, energy-driving process rather than just a response to food and drink. He argues that most people breathe suboptimally due to anatomical and lifestyle changes that have emerged with industrialization, particularly noting smaller mouths and narrower airways that push people toward mouth breathing. The conversation explores how soft, processed foods and reduced chewing in early childhood contribute to facial and dental development that limits airway space, linking these structural changes to snoring, sleep apnea, and impaired nasal breathing. The discussion then shifts to the physiology of breathing, explaining that mouth breathing tends to shallowly pull air into the chest, reduces CO2 tolerance, and disrupts the balance of oxygen delivery to tissues. Nestor explains CO2’s essential role in releasing oxygen from hemoglobin and maintaining blood pH, warning that chronic over-breathing can place the body under sustained low-grade stress and blur the line between rest and stress. The host and guest examine the nose as the preferred conduit for air, noting benefits such as nitric oxide production, improved filtration, and better sleep quality when nasal breathing is habitual. They cover practical strategies to retrain breathing, including daytime nasal breathing, diaphragmatic technique, and gradual use of sleep tape, while acknowledging that structural obstructions may require medical or dental interventions such as deviated septum corrections or orthodontic considerations. Throughout, the pair reflect on the variability of individual circumstances, offering a spectrum of approaches rather than universal prescriptions. The episode also delves into broader implications for chronic disease, sleep, and mental health, highlighting the potential of breathing retraining to improve conditions like asthma, hypertension, and anxiety by stabilizing the autonomic nervous system and reducing nocturnal arousal. Personal stories from the guests, expert references, and a focus on accessible, low-cost practices underscore the theme that empowering everyday breathwork can meaningfully extend healthspan, provided foundational, consistent habits are established.

The episode centers on breathing as a daily, foundational physiology that can influence a broad range of health outcomes. James Nestor argues that while breathing happens automatically, habitual patterns—like mouth breathing and shallow chest breaths—undermine sleep, oral health, cognitive function, and athletic performance. He recounts how ancient cultures treated breathing as medicine and explains that modern life conditions, including indoor environments and processed diets, have driven a shift toward dysfunctional breathing. The conversation covers how mouth breathing at night can alter facial development, reduce nasal airflow, and contribute to sleep-disordered breathing, with implications for growth, jaw structure, and long-term health. The guests discuss practical pathways to revert to nasal, diaphragmatic breathing as a default, noting studies that link improved breathing mechanics to lower blood pressure, better oxygen utilization, and heightened mental clarity. They describe a simple nasal-breathing exercise—placing a hand on the abdomen and tracing five-second inhalations and five-second exhalations—to retrain the nervous system toward a state of relaxation and coherence. The dialogue also delves into more intense breath-work practices, sharing experiences of heightened emotion and transient physiological changes, while cautioning that the most reliable benefits come from building a normal, nasal-breathing foundation first. The discussion broadens to everyday environmental factors, such as carbon-dioxide levels in schools, offices, and aircraft, underscoring how indoor air quality can affect cognitive performance and energy. Throughout, Nestor emphasizes that solutions are inexpensive, accessible, and largely about habit change—breathing in a slower, deeper, nasal pattern and tuning into one’s body signals to reduce chronic stress and inflammation. The talk weaves personal anecdotes, historical context, and clinical observations to present a picture of breathing as a key determinant of health, cognition, and daily vitality, while debunking myths that breathing improvements require expensive gear or exotic rituals. The episode concludes with a reminder that progress comes from consistency and foundational practice, setting the stage for further exploration of breath-focused approaches that are grounded in science and everyday life.

James Nestor, an expert on breathing, emphasizes that dysfunctional breathing affects 99% of people, leading to various health issues like diabetes, asthma, and anxiety. He believes that correcting breathing habits can significantly improve health. Nestor's personal journey began when he faced respiratory problems while surfing, prompting him to explore breathwork, which ultimately resolved his issues and sparked his interest in the subject. He highlights that modern lifestyles, characterized by poor posture and environmental factors, contribute to dysfunctional breathing. Nestor argues that breathing should be considered a fundamental pillar of health, alongside diet and exercise. He notes that many diseases of civilization, including asthma and ADHD, are linked to poor breathing habits, particularly during sleep. Nestor conducted a self-experiment comparing nasal breathing to mouth breathing, which revealed significant negative effects from mouth breathing, including poor sleep quality and increased fatigue. He asserts that the majority of people can improve their breathing habits through simple, free practices. The conversation also touches on the importance of nasal breathing, which filters and humidifies air, and produces nitric oxide, enhancing respiratory health. Nestor discusses the detrimental effects of high carbon dioxide levels in indoor environments, which can impair cognitive function and overall health. He stresses the need for better ventilation in workplaces and homes to mitigate these effects. Nestor’s insights extend to children, noting that many face breathing issues due to poor facial development linked to modern diets and habits. He advocates for awareness of breathing patterns in children, as poor habits can lead to long-term health consequences. The discussion concludes with Nestor emphasizing the accessibility of breathwork as a healing modality, encouraging individuals to adopt simple breathing practices to enhance their well-being. He believes that understanding and correcting breathing dysfunction is crucial for improving health outcomes across various demographics.

James Nestor discusses the significance of nasal breathing and its health benefits, sharing insights from his experiment at Stanford. He highlights the dangers of chronic mouth breathing, which affects air purification and can lead to various health issues, including hypertension and sleep apnea. Nestor emphasizes that nasal breathing not only conditions the air but also enhances oxygen uptake and releases nitric oxide, a molecule that helps combat viruses and supports overall health. The conversation touches on the importance of breathing techniques, such as humming, which can increase nitric oxide production significantly. Nestor shares his personal experiences during a 21-day study where he alternated between mouth and nasal breathing, revealing drastic changes in his health metrics, including increased blood pressure and sleep disturbances during mouth breathing. He explains that many people have become chronic mouth breathers due to environmental factors, anatomical changes, and lifestyle habits. Nestor discusses the potential need for surgical interventions for those with severe structural issues but advocates for exploring natural breathing techniques first. He mentions the use of mouth taping at night to encourage nasal breathing and the benefits of nasal strips to enhance airflow. The discussion also delves into the broader implications of breathing on mental and physical health, including its role in stress management and overall well-being. Nestor argues that breathing is often overlooked in medical assessments, despite its foundational role in health. Nestor shares surprising insights from his research, including the idea that evolution does not necessarily lead to improved health outcomes and that breathing can be used to regulate body temperature, as demonstrated by certain breathing techniques used by monks. He references Wim Hof's breathing method, which has shown potential in reducing symptoms of infections. The conversation concludes with Nestor emphasizing the importance of integrating healthy breathing practices into daily life, encouraging listeners to prioritize nasal breathing and explore various techniques to improve their health. He advocates for a holistic approach to well-being that includes mindfulness about breathing, diet, and lifestyle choices.

Dr. Jay Wiles discusses hidden sources of stress that contribute to anxiety and overwhelm, highlighting three key factors: dysfunctional breathing, nutrition, and a sedentary lifestyle. Dysfunctional breathing often goes unnoticed, as many individuals breathe shallowly from the chest rather than using the diaphragm. This improper breathing leads to inadequate oxygenation of vital organs like the lungs, brain, and heart, which can trigger a heightened stress response. Wiles emphasizes the importance of functional breathing, which involves deep, diaphragmatic breaths that signal the body to relax. Nutrition is another critical factor, particularly the impact of inflammation caused by poor dietary choices. High glycemic variability from excessive sugar and refined carbohydrates can lead to increased stress markers, such as reduced heart rate variability and elevated heart rate. Wiles advises that individuals should focus on balanced nutrition to reduce inflammation and improve stress resilience. A sedentary lifestyle is also a significant contributor to stress. Many people overestimate their activity levels, leading to a disconnect between perceived and actual movement. Wiles stresses that regular physical activity is essential for mental health, as inactivity increases stress, anxiety, and depression. He encourages individuals to assess their movement habits honestly and set realistic goals for increased activity. Wiles introduces heart rate variability (HRV) as a crucial biomarker for understanding stress responses. HRV reflects the nervous system's adaptability and resilience. A higher HRV indicates better stress management, while a lower HRV suggests increased stress levels. He explains that HRV can be monitored through various wearable devices, which provide insights into how the body responds to stressors. The conversation also touches on the benefits of biofeedback, which helps individuals gain awareness of their physiological states and learn to regulate their stress responses. Wiles emphasizes the importance of addressing both physiological and psychological aspects of stress, noting that thoughts and emotions can significantly influence the body's stress response. Wiles advocates for practical strategies to enhance stress resilience, including functional breathing exercises, proper nutrition, and regular movement. He also discusses the benefits of hot and cold exposure, such as sauna use and cold plunges, which can improve overall stress resilience and mental fortitude. Finally, Wiles highlights the importance of community and social connections in managing stress. Surrounding oneself with supportive individuals can foster a growth mindset and enhance overall well-being. He encourages listeners to take ownership of their health and well-being, emphasizing that small, consistent changes can lead to significant improvements in stress management and quality of life.