The School of Greatness
The School of Greatness

935 Dr. Steven Gundry: The “Healthy” Foods You Should NEVER EAT, Boosting Your Immune System and COVID-19

“A leaky gut is the cause of all disease.” QUESTIONS What are specific ways to heal your heart without surgery? (7:20) What’s the difference between a good virus and a bad virus? (18:03) What are the foods that heal leaky gut and defend against viruses? (28:50) Why is peanut butter such a bad thing?

Featured Speakers

Lewis Howes Host

Topics Discussed

Episode Summary

Executive Summary: In this episode, Dr. Stephen Gundry explains that leaky gut is the root cause of most diseases, including autoimmune conditions, heart disease, and weakened immunity. He provides dietary guidelines to heal the gut, such as avoiding grains, nightshades, peanuts, cashews, and American cow milk products, while emphasizing the importance of prebiotics from vegetables to feed gut bacteria. He also offers practical advice for boosting the immune system during the pandemic, including taking high doses of vitamin D, time-release vitamin C, zinc, and quercetin, and maintaining social connections through pets and video calls to support heart health.

Main Topics: Leaky Gut as the Root Cause of Disease (Priority: 5/5): Dr. Gundry argues that a permeable gut lining allows toxins and bacteria to enter the bloodstream, triggering inflammation and autoimmunity. Healing the gut can reverse conditions like high blood pressure, diabetes, and autoimmune diseases. Dietary Changes to Heal Leaky Gut (Priority: 5/5): Key recommendations include avoiding all grains (including rice, corn, quinoa), nightshades (tomatoes, peppers, cucumbers), peanuts, cashews, and American cow milk. Pressure cooking beans and peeling/deseeing tomatoes and peppers reduce lectin exposure. Goat or sheep milk can replace cow milk. The Role of the Microbiome in Health (Priority: 5/5): The gut microbiome comprises trillions of bacteria that influence immunity, metabolism, and even mental health. Feeding them prebiotic fiber (from vegetables) is more important than taking probiotics. The microbiome also produces compounds that support mitochondrial function and energy. Immune System Boosting During a Pandemic (Priority: 4/5): Avoiding simple carbohydrates and sugar is critical because sugar suppresses white blood cell function. Vitamin D (up to 10,000 IU/day), time-release vitamin C, zinc, and quercetin are recommended to enhance antiviral defenses. Astaxanthin may also help reduce inflammatory responses. Social Connection and Heart Health (Priority: 4/5): Social distancing is challenging for humans, who are inherently social. Dr. Gundry recommends adopting or fostering a pet, using video calls, and maintaining eye contact to preserve emotional well-being, which in turn supports immune function. Misleading Food Labels and Carbohydrates (Priority: 3/5): Many packaged foods labeled 'zero sugar' are actually high in simple carbohydrates that spike blood sugar. The true sugar content can be calculated by subtracting dietary fiber from total carbohydrates. A bagel, for example, can deliver sugar into the bloodstream faster than a soda. Mouthwash and Oral Bacteria (Priority: 3/5): Mouthwash kills beneficial oral bacteria that produce nitric oxide, essential for blood vessel dilation. This can raise blood pressure. Oil pulling with olive oil is recommended instead.

Key Arguments: Leaky gut is the common denominator in virtually all chronic diseases, including autoimmune conditions, heart disease, and high blood pressure. Healing the gut requires eliminating foods that contain lectins, which break the tight junctions of the gut lining. This includes grains, nightshades, peanuts, and cashews. Feeding gut bacteria with prebiotic fiber (from vegetables) is more important than taking probiotics, because probiotics won't thrive without the correct food. Vitamin D at high doses (e.g., 10,000–150,000 IU) is a potent antiviral and has no toxicity, contrary to common belief. Social connection, including pet ownership and eye contact, is vital for emotional health and immune resilience, especially during isolation. The standard American diet destroys the microbiome, leading to a weakened immune system and increased susceptibility to infections. Food labels are deceptive: total carbohydrates minus fiber reveals the true sugar content, which is often much higher than the listed 'sugar' or 'added sugar'. Oral bacteria are essential for nitric oxide production; mouthwash should be avoided and replaced with coconut oil or olive oil pulling.

Data Points: Total bacteria in the human body: 100 trillion - Gundry states the human body hosts over 100 trillion bacteria, with 10,000+ species. Non-human genetic material: 99% - 99% of the genetic material in the body is non-human, from bacteria and viruses. Disease causation by genetics vs environment: 7-8% - Only 7-8% of disease risk is genetic; 97-98% is environmental, primarily diet and lifestyle. Autoimmune disease reversal rate: 94% - 94% of patients (95 out of 102) with biomarker-proven autoimmune disease reversed their condition and stopped medications after six months on Gundry's program. Reactivity to corn in gluten-sensitive individuals: 70% - 70% of people who react to gluten also react to corn as if it were gluten. Vitamin D daily dose recommended: 5,000–10,000 IU - Gundry recommends 5,000 IU/day normally and up to 10,000 IU/day during the pandemic, citing that toxicity is virtually unheard of. Vitamin D loading dose: 150,000 IU - Gundry takes 150,000 IU for three consecutive days if feeling ill, claiming it cuts illness short without toxicity. Sugar in a bagel: 9 teaspoons - A typical bagel contains 35g of carbohydrates (after subtracting fiber) = 9 teaspoons of sugar, entering the bloodstream faster than a soda.

Pivotal Quotes: "All disease begins in the gut, and I add, end in the gut." — Dr. Stephen Gundry: Summarizing the central thesis that gut health determines overall health and disease. "If it tastes good, spit it out." — Jack Lalanne (quoted by Dr. Gundry): Gundry uses this quote to emphasize that we should eat for our microbiome, not our taste buds. "The reason people with chronic diseases are susceptible to the virus is not because they have a chronic disease. It's because that is a sign of a leaky gut and your immune system is impaired. Fix the leaky gut, you won't get sick." — Dr. Stephen Gundry: Connecting leaky gut to vulnerability to infections like COVID-19, and offering a solution.

Implications: Listeners can take immediate action to strengthen their immune systems by eliminating grains, sugar, and processed foods, supplementing with vitamin D and C, and healing their gut. This approach may reduce susceptibility to viruses and chronic diseases. Social connection is equally important; adopting a pet or using video calls can mitigate the negative effects of isolation.

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About The School of Greatness

Lewis Howes is a New York Times best-selling author, 2x All-American athlete, keynote speaker, and entrepreneur. The School of Greatness shares inspiring interviews from the most successful people on the planet—world-renowned leaders in business, entertainment, sports, science, health, and literature—to inspire YOU to unlock your inner greatness and live your best life.

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