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Dr Mark Hyman on Eating Fat to Get Healthy - with Lewis Howes

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Lewis HoweshostDr. Mark Hymanguest

Feb 22, 201656mWatch on YouTube

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CHAPTERS

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Chapter summaries

Why low-fat guidelines fueled obesity and diabetes
Lewis Howes introduces Dr. Mark Hyman and his book premise that eating fat can support weight loss and health. Dr. Hyman argues that long-standing government advice to eat low fat and prioritize grains contributed to major obesity and diabetes epidemics, and that the original guidance was built on weak evidence.
- •Dr. Hyman says government guidance promoted grains and low-fat eating while warning against fats and oils
- •He claims this advice coincided with the worst obesity and diabetes epidemic in history
- •He argues the recommendations were based on shoddy science and dismissed randomized trial evidence
- •Lewis frames the book’s message as opposite of what most people were taught about fat and health
Calories aren’t the whole story: food as hormonal and genetic ‘information’
Dr. Hyman challenges the “calories in, calories out” model, calling metabolism a hormonal issue rather than a math equation. He explains his view that food acts as information that can switch genes and hormones on or off and influence inflammation, brain chemistry, and the gut microbiome.
- •Dr. Hyman rejects the idea that all calories are the same and criticizes the 'calories in, calories out' message
- •He says the calorie model implies weight is a personal failure rather than a biology issue
- •He claims a Coca-Cola-funded group promoted the energy-balance narrative and that it was discredited
- •He describes food as information that affects genes, hormones, inflammation, brain chemistry, and gut microbes minute by minute
Why fat can reduce cravings and boost metabolism
Dr. Hyman describes a hormonal framework in which dietary fat helps reduce hunger and cravings while supporting fat burning. He contrasts this with sugar and refined flour, which he says raise insulin and promote fat storage and increased hunger.
- •Dr. Hyman says eating fat increases satisfaction and reduces cravings
- •He claims fat affects brain addiction pathways and helps people feel less hungry
- •He says dietary fat speeds metabolism, releases fat from fat cells, and helps burn fat
- •He contrasts fat with sugar/refined flour, which he says increase insulin and hunger
- •Lewis and Dr. Hyman share personal anecdotes about past sugar-heavy eating patterns
Evidence he cites: higher-fat diets and shifting government guidance
Dr. Hyman points to a controlled study comparing macronutrient ratios at equal calories, claiming the higher-fat group burned more energy daily. He also says U.S. dietary policy reversed its stance on fat and cholesterol, while noting ongoing issues with sugar guidance and labeling.
- •Dr. Hyman describes research where equal-calorie diets differed in fat/carbs and the higher-fat group burned more calories
- •He claims the U.S. government removed limits on dietary fat and eased cholesterol restrictions, saying “eggs are back”
- •He says advisory language about sugar-sweetened beverages was softened due to food lobbying
- •He argues labels should specify added sugar and that current labeling contributes to confusion
- •He emphasizes insulin as a fat-storage hormone influenced by sugar and refined starches
Insulin, refined flour, and the modern bread problem
Dr. Hyman focuses on insulin as a key driver of fat storage and says refined flour can spike blood sugar significantly. He argues modern grains and breads differ from historical versions due to refining and processing, and he discusses where grains may or may not fit depending on tolerance.
- •Dr. Hyman says sugar and refined flour raise insulin and promote fat storage
- •He claims white bread can raise blood sugar more than table sugar and criticizes many ‘whole wheat’ products
- •He says bread today differs from what ancestors ate due to milling/refinement changes over time
- •He says not all grains are necessarily bad, but quantity and individual response matter
- •He introduces the idea of carbohydrate intolerance and mentions a questionnaire in his book
The ‘Pegan’ middle ground: shared principles of paleo and vegan
Dr. Hyman introduces the “Pegan” approach as a blend between paleo and vegan philosophies. He outlines broad agreement on whole, unprocessed foods and high plant intake, then explains common disputes around beans, grains, dairy, and meat.
- •Dr. Hyman defines the Pegan concept as a middle path between paleo and vegan
- •He says both approaches emphasize whole, unprocessed foods and removing additives and industrial ingredients
- •He says both encourage lots of fruits and vegetables and avoidance of high-fructose corn syrup and artificial additives
- •He argues many people do better removing dairy, describing dairy proteins as inflammatory for some
- •He explains phytonutrients as plant compounds beyond vitamins/minerals and gives examples from foods
Meat, ethics, and environment—and why quantity and quality matter
Dr. Hyman lays out environmental, moral, and health dimensions of meat consumption. He criticizes factory farming and advocates reducing total meat intake, using the idea of meat as a condiment rather than the main portion.
- •Dr. Hyman says factory-farmed meat contributes to antibiotics exposure and environmental harm
- •He mentions methane, fossil fuel use, and water use concerns tied to animal production
- •He argues people should not support factory farming and should eat less meat overall
- •He introduces the idea of “condameat,” meaning meat used like a condiment
- •He notes that sustainably raised, grass-fed meat is less abundant and often more expensive, implying reduced consumption
What the meat studies show (in his review) and practical takeaways
Dr. Hyman explains why he finds many meat studies hard to interpret, emphasizing confounding lifestyle factors in population research. He describes a study of health-food-store shoppers and concludes that meat eaters and vegetarians can have similar outcomes when overall diet and lifestyle are healthy.
- •Dr. Hyman says many anti-meat findings come from observational studies with confounding factors
- •Lewis lists common confounders such as smoking, drinking, stress, and poor sleep, which Dr. Hyman agrees with
- •Dr. Hyman says many studies involve factory-farmed meat and may not generalize to grass-fed meat
- •He cites a study of 11,000 health-food-store shoppers where meat eaters and vegetarians had similar health outcomes
- •He concludes modest amounts of sustainably raised meat can fit if moral concerns are not present
Dr. Hyman’s daily eating pattern and how he structures a plate
Lewis asks what Dr. Hyman personally eats, and Dr. Hyman shares examples from his day. He describes a pattern centered on vegetables, healthy fats, quality protein, low-glycemic fruit, and planning ahead to avoid “food emergencies.”
- •Dr. Hyman describes a breakfast shake with ingredients like hemp/coconut/chia and added fats like coconut and almond butter
- •He describes lunch as a large salad with avocado, olive oil, and wild salmon
- •He says he often aims for most of his plate by volume to be non-starchy vegetables
- •He says by calories he targets a high proportion from fat while emphasizing that fat doesn’t take up much volume
- •He discusses low-glycemic fruits (mostly berries, plus some others) and keeping snacks on hand to avoid poor choices
Functional medicine: treating the body as an interconnected system
Dr. Hyman explains functional medicine as a framework based on systems biology and networks rather than isolated organs. He argues modern specialization misses cross-system connections and positions functional medicine as focused on creating health rather than only treating disease.
- •Dr. Hyman compares the shift in thinking to a major scientific turning point
- •He says conventional medicine is organized by organs and specialties, which can miss root causes
- •He emphasizes the body as an ecosystem where everything is connected
- •He describes functional medicine as interpreting body data through testing and systems thinking
- •He uses a soil-and-farming analogy: create healthy conditions so disease doesn’t ‘land’
Microbiome and fecal transplants: dramatic examples of system-level care
Dr. Hyman highlights the microbiome as a major driver of health and disease and describes fecal microbial transplants as an emerging medical intervention. Lewis reacts with surprise as Dr. Hyman explains the procedure, its origins in treating C. diff, and how it works like a concentrated probiotic.
- •Dr. Hyman says the microbiome has far more genes than humans and affects weight and metabolism
- •He claims transferring stool from a thin person to someone with diabetes can reverse it
- •He describes fecal transplants as highly effective for C. diff and says research is expanding to other conditions
- •He explains the process: screening donors, processing stool with saline, and delivering via colonoscope/catheter; he also mentions encapsulated pills
- •He frames these examples as evidence that health issues often connect through gut ecology
A functional medicine case: multiple conditions resolved by addressing food and gut
Dr. Hyman tells a patient story involving numerous diagnoses and specialist care, then explains how he looked for shared inflammatory drivers. He describes changing diet, removing allergens, treating gut imbalances, and adding targeted supports, reporting broad symptom resolution and weight loss within two months.
- •Dr. Hyman describes a patient with autoimmune symptoms, metabolic issues, mood and sleep problems, and GI complaints
- •He contrasts specialist-by-specialist treatment with his approach of asking how issues are connected
- •He reports using an anti-inflammatory, low-glycemic Pegan-style diet plus gut-focused interventions
- •He mentions removing ‘bad bugs,’ adding probiotics and enzymes, healing the gut lining, and using nutrients like fish oil and vitamin D
- •He attributes outcomes to food and gut flora, emphasizing the immune system’s strong connection to the gut
A practical reset: the 21-day program, elimination approach, and MCT/fasting discussion
Lewis asks how listeners should start if they feel chronically unwell, and Dr. Hyman describes a structured, practical reset approach. They discuss doing a full elimination rather than gradual changes, reintroducing foods to identify triggers, and how MCT oil/coffee can affect hunger and focus.
- •Dr. Hyman describes creating practical programs to help people get from sick to well quickly, including a 21-day plan
- •He says many people can reset and then decide if deeper investigation is needed for remaining symptoms
- •He describes tracking symptom changes with a before/after questionnaire and reports large reductions in symptoms among participants
- •He recommends removing multiple potential irritants at once, then adding back foods one at a time to see what bothers you
- •He explains MCT oil in coffee as promoting ketosis, supporting alertness, and increasing metabolism; Lewis shares his fasting and elimination experiments
Why he became a doctor: Buddhism, service, and finding meaning in helping
Lewis shifts to Dr. Hyman’s origin story, and Dr. Hyman explains how studying Buddhism shaped his view of healing and service. He describes the satisfaction he gets from helping others and shares a vivid example of medical service work after the Haiti earthquake.
- •Dr. Hyman says he studied Buddhism at Cornell and initially didn’t focus on science or medicine
- •He describes Buddhism as a therapeutic system aimed at reducing suffering and tied to traditions of healing
- •He discusses the bodhisattva idea of returning in service to help others
- •He says altruism activates reward pathways similarly to addictive substances, describing how he feels ‘high’ from helping people
- •He recounts his experience providing aid in Haiti after the earthquake and feeling present and peaceful while serving
Food policy as the lever to fix health, economy, and society
Asked what he would change with unlimited resources, Dr. Hyman focuses on transforming the food system through policy. He lists changes involving subsidies, marketing, labeling, antibiotics, school food, and taxation, and connects food policy to healthcare costs, education outcomes, and national security concerns.
- •Dr. Hyman says the food system drives many economic and social problems
- •He advocates ending subsidies for commodity crops used in processed foods and supporting fruits and vegetables instead
- •He calls for restricting junk food marketing to kids and ending routine antibiotics in animal feed except for disease treatment
- •He proposes clearer labeling, including simple warning-style systems, and discusses taxing junk food and soda to reduce consumption
- •He links poor food policy to rising healthcare spending, educational achievement gaps, and national security issues
Three truths and a definition of greatness: presence, truth, and love
Lewis closes with signature questions about legacy and greatness. Dr. Hyman centers his answers on how someone shows up in the world—being present, telling the truth with love, and cultivating a healthy ‘container’ so it’s easier to live with joy and connection.
- •Dr. Hyman’s three truths focus on love, joy, connection, laughter, and how we show up daily
- •He says caring for the body ‘container’ supports the ability to be present and loving
- •Lewis asks for his definition of greatness and Dr. Hyman defines it as presence, truth with love, and giving
- •They share where to find his resources and book materials, including a free preview option
- •Lewis offers an acknowledgment of Dr. Hyman’s work before the final wrap-up

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