Tired of conflicting nutrition advice? Nutrition scientist Ty Beal, PhD cuts through the noise with credible, science-backed insights that are actually useful.

In this trailer, discover what makes The Ty Beal Show different: no diet fads, no fear-mongering—just practical guidance from leading experts in nutrition, public health, and food systems. Learn why there's no perfect diet for everyone and how to make informed choices about your health.

Each week, expect evidence-based conversations delivered in plain language, with facts over fear and understanding over judgment.

Ready to take charge of your health? Subscribe now for nutrition science you can trust.

New episodes weekly.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Ever wonder why it's so hard to resist that bag of chips or stop eating when you're full? In this inaugural episode of The Ty Beal Show, neuroscientist and author Dr. Stephan Guyenet reveals the fascinating science behind our eating behaviors and why our brains aren't built for today's food environment.

Dr. Guyenet, author of "The Hungry Brain," a Publishers Weekly Best Book of the Year, breaks down complex topics into clear, actionable insights. You'll discover why hunter-gatherers never struggled with obesity, how ultra-processed foods hijack our brain's reward systems, and why willpower alone isn't enough to overcome modern eating challenges.

What you'll learn:

• The real reason obesity has skyrocketed over the past century
• How leptin (the hormone you've never heard of) controls your appetite
• Why diets fail and what brain science tells us about sustainable weight loss
• The truth about GLP-1 drugs like Ozempic and their remarkable effects
• How to navigate the confusing world of nutrition information

Plus, Stephan shares his work at GiveWell, where he helps direct millions of dollars to save lives in the world's poorest countries, and discusses the critical importance of international health aid.

Whether you're struggling with your own eating habits, curious about the latest weight loss breakthroughs, or simply want to understand the science behind nutrition headlines, this episode offers evidence-based insights without the hype.

Find Dr. Stephan Guyenet on X. Buy his book The Hungry Brain. View popular nutrition book reviews at Red Pen Reviews.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

How do animals impact our environment, and what role should they play in sustainable food systems? In this episode of The Ty Beal Show, Dr. Anne Mottet, agro-economist and global lead for livestock at the International Fund for Agricultural Development (IFAD), explores the complex relationships between livestock and climate change, land use, biodiversity, and water resources.

Dr. Mottet, who oversees $1 billion in livestock investments and has over 20 years of experience in research and international development, explains why the environmental impact of livestock depends heavily on how and where animals are raised. She discusses why half the land used by livestock can't be converted to crops, how grazing animals can benefit ecosystems when properly managed, and why 1.4 billion people worldwide depend on livestock for their livelihoods.

What you'll learn:

• Why removing livestock from marginal lands can harm biodiversity
• The difference between methane and CO2 in climate impact
• How livestock compare to transport in greenhouse gas emissions
• The role of animals in converting inedible plants to nutritious food
• How livestock can both improve and degrade soil and water systems
• Why food waste and production efficiency matter for sustainability
• The truth about water use in beef production
• The trade-offs between different types of animal products

Dr. Mottet also discusses the social and cultural importance of livestock, from providing savings accounts for people without bank access to enabling crop production through animal traction on half the world's farmland. Whether you're concerned about climate change, curious about sustainable agriculture, or trying to make informed food choices, this episode offers a science-based perspective on both the benefits and risks of livestock in our food systems.

Find Dr. Anne Mottet's work at IFAD. Connect with her on X and Instagram.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What if the secret to sustainable weight maintenance isn't counting calories or following strict diets, but understanding which foods naturally make you feel full? In this episode of The Ty Beal Show, Dr. Andreas Eenfeldt, founder and CEO of Diet Doctor, shares his evolution from keto advocate to pioneer of "satiety per calorie" - a revolutionary approach to eating that works regardless of whether you're low-carb, plant-based, or somewhere in between.

Dr. Eenfeldt, who built the world's largest keto and low-carb website, reveals why he's moved beyond strict dietary rules to focus on foods that naturally control hunger. Drawing from hundreds of thousands of eating logs and rigorous scientific research, he explains how protein, energy density, fiber, and food processing combine to determine how much we eat.

What you'll learn:

• The benefits and risks of ketogenic and low-carb diets
• Why some people get dangerously high cholesterol on keto (and what to do about it)
• How ultra-processed foods are engineered to make us overeat
• The four key factors that determine how full food makes you feel
• Why you can succeed with either low-carb high-fat OR high-carb low-fat diets
• How to navigate social eating while maintaining healthy habits
• The science behind Andreas's new Hava app and its AI-powered approach to eating

Dr. Eenfeldt also shares his personal dietary evolution - how after 20 years of strict low-carb eating, he now enjoys greater flexibility while achieving better results. Whether you're keto-curious, struggling with food cravings, or simply want a more sustainable approach to healthy eating, this episode offers practical, science-based strategies that work in the real world.

Find Dr. Andreas Eenfeldt's work at Diet Doctor and try the Hava app for free.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Think ultra-processed foods are bad just because they're high in calories? It's not that simple. In this episode of The Ty Beal Show, nutritional biologist and food scientist Marit Kolby, MS, reveals the shocking mechanisms behind why your body treats a 200-calorie apple completely differently than 200 calories from an ultra-processed snack - and it goes far beyond overconsumption.

Marit, author of the popular Norwegian book "What and When Should We Eat?", explains how ultra-processed foods disrupt our gut homeostasis, hijack cellular communication, and create a cascade of inflammation that affects everything from nutrient absorption to mental health. Drawing from her background in food science, microbiology, and nutritional biology, she connects the dots between industrial food processing and widespread health problems.

What you'll learn:

• Why ultra-processed foods are "evolutionary novel industrial formulations" that our bodies haven't evolved to handle
• How food acts as information, not just fuel, and why extracted compounds send the wrong signals
• The critical difference between eating whole food cells versus processed extracts
• Why gut inflammation from processed foods blocks iron absorption and creates nutrient deficiencies
• How cosmetic additives like emulsifiers and artificial colors disrupt the protective gut barrier
• The "double hit" effect: losing protective compounds while gaining inflammatory triggers
• Why heating food in plastic containers releases dangerous microplastics into your meals
• Simple food swaps that don't require complicated recipes or expensive ingredients

Marit also reveals why allowing yourself to feel hungry between meals is essential for cellular repair, how ultra-processed foods override natural satiety signals through inflammation, and her surprisingly optimistic view on how easy it can be to transition back to whole foods. Whether you're struggling with mysterious health issues, concerned about your family's diet, or simply want to understand the science behind food processing, this episode offers eye-opening insights from one of the field's leading researchers.

Find Marit Kolby on Instagram, X, and LinkedIn.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Why do billions of people suffer from malnutrition in a world that produces enough food to feed everyone? In this episode of The Ty Beal Show, Dr. Lawrence Haddad, World Food Prize winner and executive director of the Global Alliance for Improved Nutrition (GAIN), reveals the shocking truth about global malnutrition and what it would actually take to end it.

Dr. Haddad, who was appointed Companion of the Order of St. Michael and St. George by King Charles III for his services to international nutrition, explains why malnutrition isn't just about hunger - it's about justice, access, and inequality. From his early days studying agricultural economics to leading a global nutrition organization, he shares insights from decades of fighting one of humanity's most persistent challenges.

What you'll learn:

• Why 3-4 billion people are deficient in essential nutrients (not just the 800 million who are hungry)
• The biggest misconceptions about malnutrition and why it affects every country
• How stunning brain growth in the first 1,000 days makes early nutrition critical for life
• Why $23 return on every $1 invested in nutrition isn't enough to motivate politicians
• The hidden potential of workforce nutrition to transform businesses and communities
• How recent aid cuts could lead to 369,000 additional child deaths annually
• Why development finance institutions may be the key to replacing traditional aid
• The role of small and medium enterprises in feeding the world's poor

Dr. Haddad also discusses why nutrition remains an "orphan issue" without strong institutional champions, how the private sector brilliantly markets unhealthy foods while governments fail at promoting healthy ones, and his surprising optimism despite massive funding cuts. Whether you're concerned about global inequality, interested in international development, or want to understand why ending malnutrition is both achievable and essential, this episode offers a masterclass from one of the field's most respected leaders.

Find Dr. Lawrence Haddad's work at GAIN. Connect with him on LinkedIn.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Can what you eat actually treat depression? In this episode of The Ty Beal Show, Dr. Ally Jaffee, MD, a psychiatry resident doctor and co-founder of NutriTank, reveals the science behind nutritional psychiatry and why your gut health might be the key to mental wellness.

Dr. Jaffee, winner of the 2024 Cura Mental Health Advocate of the Year Award, shares her deeply personal journey into psychiatry—from losing her grandfather to suicide at two weeks old to experiencing her own clinical depression during medical school. Her story illuminates the concept of the "wounded healer" in healthcare and how lived experience can enhance, rather than compromise, clinical practice.

Drawing from landmark research including the SMILES trial—the first randomized controlled trial to show dietary intervention could put depression into remission—Dr. Jaffee explains how the gut-brain axis creates a bidirectional pathway between our digestive system and mental health. She breaks down why people with inflammatory bowel disease have higher rates of mental illness, and how restoring gut microbiome balance can enhance both mood and medication effectiveness.

What you'll learn:

• Why medical schools barely teach nutrition despite diet being the leading cause of death worldwide
• The "triple F" approach to brain health: fermented foods, fiber, and fish
• How NutriTank is revolutionizing medical education across the UK and influencing national health policy
• Why traditional psychiatric treatment often jumps straight to medication instead of addressing root causes
• The power of "safe disclosure"—when healthcare providers thoughtfully share their own experiences
• How social prescription is transforming mental health treatment for young people
• Why closing "third spaces" like youth centers contributes to rising adolescent loneliness
• The remarkable story of transforming psychiatric ward culture through cooking programs

Dr. Jaffee also addresses the mental health crisis among young people, explaining how creative arts, nature therapy, and non-traditional interventions can succeed where conventional talk therapy fails. From spoken word poetry to surf therapy, she reveals innovative approaches that are helping disconnected youth find community and healing.

Whether you're struggling with mental health challenges, curious about the food-mood connection, or interested in how healthcare systems can evolve beyond the "pill for every ill" mentality, this episode offers hope and practical insights from a passionate advocate working to transform both medical education and patient care.

Find Dr. Ally Jaffee's work at NutriTank and follow her on LinkedIn and Instagram.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Why do so many conventional treatments fail to solve chronic health problems? In this episode of The Ty Beal Show, Chris Kresser, MS, LAc, former functional medicine practitioner and New York Times bestselling author, reveals how a systems-based approach uncovers and addresses the true drivers of disease—leading to lasting results instead of temporary symptom relief.

Drawing on over 15 years of clinical practice, Chris explains the critical differences between functional, integrative, and conventional medicine, sharing remarkable stories of patients who reversed serious autoimmune conditions, avoided major surgery, and reclaimed their health. He breaks down how environmental triggers, gut health, nutrient deficiencies, and lifestyle factors interact to cause chronic illness—and how personalized nutrition and lab testing can uncover the hidden causes conventional ranges often miss.

What you'll learn:

• Why functional medicine asks "why" instead of just suppressing symptoms with drugs or supplements
• How a patient with severe Crohn's disease avoided intestinal surgery and healed in weeks
• Why conventional lab ranges often overlook early nutrient deficiencies
• The most common nutrient shortfalls: potassium, magnesium, vitamin D, EPA/DHA, iron, zinc, and B12
• Why there's no one-size-fits-all diet—and how to create a personalized nutrition template
• The 80/20 principle: why striving for perfection can harm your health
• How social connection and stress management can be as important as diet for healing

Chris also shares his surprising take on vegan, carnivore, and omnivorous diets, explains how lab work can reveal dietary patterns, and tells the story of the "beer and pizza" recovery that transformed a patient's life. Whether you're facing unexplained symptoms, frustrated by conventional treatments, or simply curious about holistic approaches, this episode offers a masterclass in root cause medicine from one of the field's most experienced voices.

Find Chris Kresser's work at chriskresser.com and kresserinstitute.com. Connect with Chris on Instagram, X, and Facebook.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What does it take to eat for the health of humans and the planet? In this episode of The Ty Beal Show, Dr. Walter Willett, the world’s most cited nutritionist, gives a sneak peek at the upcoming 2025 EAT-Lancet Commission and provides his take on ultra-processed foods and seed oils.

From his family farm in Michigan to leading Harvard's Department of Nutrition for 25 years, Dr. Willett shares the journey that led him to pioneer nutritional epidemiology. At the center of this conversation is the planetary health diet—a flexible framework to address human and planetary health.

What you'll discover:

• The 2025 EAT-Lancet Commission's updated recommendations (releasing October 3rd)
• How to adapt the planetary health diet from vegan to omnivore preferences
• The limitations of the NOVA ultra-processed food framework
• The health effects of seed oils like soybean and canola oil
• How Dr. Willett's trans-fat research transformed American food policy

Dr. Willett addresses the seed oil controversy with decades of research, explaining why these oils have helped reduce heart disease rates since the 1950s. He also reveals why the real drivers of obesity aren't seed oils but sugar-sweetened beverages and refined starches, and how the planetary health diet balances individual health with global sustainability and equity.

Find Dr. Walter Willett's research at Harvard T.H. Chan School of Public Health and learn more about the EAT-Lancet Commission.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What does the science say about plant-based diets, longevity, and cardiovascular health? In this episode of The Ty Beal Show, Dr. Gil Carvalho, research scientist and host of Nutrition Made Simple with over a million monthly viewers, cuts through the noise to reveal what the evidence shows.

Dr. Carvalho challenges common assumptions about plant-based eating, explaining why the term itself is misleading and how Mediterranean, pescatarian, and even well-planned omnivorous diets can be equally health-promoting. Drawing from Harvard's landmark healthy aging studies and genetic research, he reveals how optimized nutrition patterns can add 10-12 years to your lifespan—but warns against the dangerous mythology surrounding certain dietary extremes.

This deep-dive conversation explores the mechanics of cardiovascular disease, with Dr. Carvalho breaking down why ApoB—not LDL cholesterol—is the gold standard for assessing heart disease risk. He shares his personal experience with genetic risk factors including elevated Lp(a), explaining when imaging tests like coronary calcium scores become valuable and how to optimize lipid levels through diet, lifestyle, and targeted medications.

What you'll learn:

• Why "plant-based" encompasses everything from Mediterranean to vegan diets—and why the distinction may matter less than you think
• The critical difference between ApoB and LDL cholesterol for predicting heart attacks
• Why B12 deficiency on vegan diets can cause irreversible nervous system damage
• How isometric exercises like wall squats can lower blood pressure as effectively as medication
• Why weight loss consistently improves glucose metabolism regardless of diet type

Dr. Carvalho also shares his personal experiments with statin medications, revealing how different drugs affected his insulin resistance and ApoB levels differently, and explains why promising new Lp(a)-lowering medications might revolutionize cardiovascular prevention within the next few years.

Whether you're navigating conflicting dietary advice, concerned about cardiovascular risk, or simply want to understand what nutritional science says about plant-based diets, this episode provides evidence-based clarity from one of the field's most trusted science communicators.

Find Dr. Gil Carvalho's work at Nutrition Made Simple on YouTube and follow him on X and Facebook.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What does it take to foster a healthy relationship with food for children and adolescents? In this episode of The Ty Beal Show, registered dietitian and certified eating disorder specialist Taylor Aasand explores the complexities of eating disorders like ARFID, anorexia nervosa, and bulimia nervosa. Drawing from her practice in Phoenix-Scottsdale, she shares evidence-based strategies for prevention, treatment, and recovery, emphasizing compassionate, family-centered approaches and the power of intuitive eating.

What you'll learn:

• The prevalence and impact of eating disorders in youth, affecting up to 1 in 8 individuals
• How ARFID differs from picky eating and its severe consequences, like growth stunting
• Why body image drives anorexia but not ARFID, and how to spot subtle warning signs
• Practical ways to support recovery, including social media audits and family-style meals
• How intuitive eating promotes self-compassion and balanced nutrition without restrictive diets

Taylor also discusses navigating today’s challenging food environment, offering parents actionable advice on fostering positive food conversations to prevent disordered eating. Find Taylor Aasand’s work at her private practice.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What are the hidden compounds in our food, and how do farming practices shape their presence? In this episode of The Ty Beal Show, Stephan van Vliet, PhD, Professor of Nutrition at Utah State University, discusses his pioneering work in metabolomics and the concept of "nutritional dark matter"—the thousands of understudied compounds in food that may impact health.

Dr. van Vliet shares his journey from studying egg nutrition to uncovering the complexity of phytochemicals and other bioactive compounds in foods like beef, bison, and plants. The conversation explores how regenerative agriculture, with its focus on soil health and biodiversity, enhances nutrient density in crops and livestock, and what this could mean for human health and sustainable food systems.

What you'll learn:

• The meaning of "nutritional dark matter" and why it matters for health
• How regenerative farming influences phytochemicals in plants and animal products
• The unique role of grazing animals in upcycling inedible plants into bioavailable nutrients
• The differences between pasture-raised and grain-fed beef from a metabolomics perspective
• Practical tips for choosing nutrient-dense foods at the grocery store or farmers market

Dr. van Vliet also discusses his ongoing research, including trials comparing regenerative and conventional agriculture, and the potential multi-generational health impacts of dietary patterns. This episode offers insights into how food production systems shape the nutritional quality of what we eat and their broader implications for health and the environment.

Find Dr. Stephan van Vliet’s research at Utah State University and learn more about his work at the van Vliet Lab.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What exactly is obsessive-compulsive disorder (OCD)—and how can evidence-based therapies help people reclaim their lives? In this episode of The Ty Beal Show, Dr. Sara Brungardt, licensed professional counselor and founder of CalmOCD, shares her expertise on diagnosing and treating OCD with proven methods like Exposure and Response Prevention (ERP) and Acceptance and Commitment Therapy (ACT).

Sara explains how OCD differs from perfectionism or personality traits, why intrusive thoughts don’t define a person’s character, and how therapy can rewire the brain’s fear response. We also discuss common myths about OCD, overlaps with eating disorders and anxiety, and how families can best support loved ones navigating recovery.

Highlights from the episode include:

• What distinguishes OCD from ordinary worries or habits
• How ERP and ACT work to reduce compulsions and anxiety
• The connection between OCD, eating disorders, and control
• Practical advice for supporting someone with OCD or seeking treatment

Dr. Brungardt offers a compassionate, science-based perspective that brings clarity to a misunderstood condition—and hope to those living with it.

Find Dr. Brungardt at CalmOCD.com and on Instagram.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Why do so many U.S. nutrition and health policies seem to favor ultra-processed foods over real, nutrient-dense foods—and what can be done about it? In this episode of The Ty Beal Show, Calley Means—New York Times #1 best-selling author, co-founder of Truemed, and Senior Advisor to the White House on MAHA—unpacks the structural incentives driving chronic disease in America.

Calley draws on his experience as a former political consultant for food and pharmaceutical companies to reveal how lobbying and reimbursement systems shape the foods we eat and the treatments we receive. We discuss how misaligned incentives fuel the epidemic of obesity and metabolic disorders, why prevention remains undervalued, and what reforms could redirect billions toward truly health-promoting foods.

Highlights from the episode include:

• How Big Food and Big Pharma shape nutrition guidelines and healthcare spending
• The impact of ultra-processed foods on children’s health and chronic disease risk
• Policy and market innovations—like food-as-medicine—that could shift incentives toward prevention
• Practical steps for individuals and policymakers to support healthier food environments

Calley shares an urgent, insider’s perspective on how policy and industry can change to address the root causes of metabolic disease rather than merely treating symptoms.

Find Calley Means on X and Instagram, learn more about Truemed at truemed.com, and order Good Energy on Amazon.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Heart disease is still the top killer globally—but prevention and innovation are reshaping how we think about risk. In this episode of The Ty Beal Show, cardiologist Dr. Ethan Weiss—Chief Scientific Officer at Marea Therapeutics and long-time UCSF faculty expert—walks us through the intersection of genetics, metabolism, and cardiovascular health.

Dr. Weiss explains the concept of cardio-endocrine medicine, where heart disease and metabolic disorders like diabetes are deeply interlinked, and explores how imaging, biomarkers, and genomics are improving risk prediction. We dive into LDL vs ApoB, the role of new lipid therapies, and how personalized prevention looks in practice. Along the way, Dr. Weiss shares his experience with a Mediterranean-style low-carb diet and his take on time-restricted eating.

Takeaways from the episode include:

• Why metabolic disease is inseparable from cardiovascular risk
• How new tools (imaging, biomarkers, genetics) sharpen our prediction
• Evidence-based lifestyle and clinical strategies to reduce risk
• Evaluating low-carb diets, saturated fat, and fasting approaches
• What the future holds in therapies for lipoprotein(a) and beyond

Find Dr. Ethan Weiss at Marea Therapeutics and UCSF. Connect with him on X.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Can grazing livestock help restore soils, support biodiversity, and even mitigate climate change? In this episode of The Ty Beal Show, rangeland ecologist at Colorado State University, Dr. Paige Stanley, shares her research on regenerative grazing systems and their potential to benefit both landscapes and livelihoods.

Paige explains how well-managed grazing influences soil carbon dynamics, plant communities, and ecosystem resilience—and why not all grazing systems are created equal. We discuss the science behind methane emissions from cattle, trade-offs in land use, and how policy and incentives can help expand regenerative ranching practices that balance productivity with environmental stewardship.

Highlights from the episode include: • How regenerative grazing differs from conventional grazing and why management matters • What the latest research says about grazing’s role in soil carbon sequestration and biodiversity • The methane puzzle—short-lived climate pollutants and strategies to reduce emissions • Opportunities and challenges in scaling regenerative ranching for both ranchers and policymakers

Paige brings a nuanced, evidence-based perspective on the role of grazing animals in sustainable food systems—cutting through polarized debates with insights from the field.

Find Paige Stanley on X and at her website.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

How much protein do we really need? And is resistance training more important than we thought? In this episode of The Ty Beal Show, Stuart Phillips, PhD, renowned expert in muscle health and aging at McMaster University, breaks down the science of muscle preservation across the lifespan.

Stuart shares his evolving perspective on protein's role in building and maintaining muscle, explaining why exercise is the true driver of muscle development—and why the current Recommended Dietary Allowance may be setting the bar too low. We discuss optimal protein intake for different life stages, the nuances of plant-based versus animal-based proteins, and why strength training matters far more for longevity than most people realize.

Highlights from the episode include:

• Why exercise, not protein alone, is the key to preserving muscle as we age
• The difference between strength and power—and why power matters most for preventing falls and maintaining independence
• Evidence-based resistance training: what works and how much time you really need to invest
• The RDA for protein versus optimal intake—and why the distinction matters globally
• Protein requirements across life stages: pregnancy, childhood, older adulthood
• Plant-based versus animal-based proteins: separating science from ideology
• Safe protein intake ranges for longevity and health
• What older adults should prioritize to maintain muscle and function

Dr. Phillips brings a refreshingly balanced perspective grounded in decades of rigorous research—pushing back against both protein minimalism and protein extremism to reveal what the evidence says.

Find Dr. Stuart Phillips at McMaster University. Connect with him on X, Instagram, and LinkedIn.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

What are ultra-processed foods (UPFs), and why is the concept so controversial? How does a diet high in these foods affect our bodies, brains, and hormones? And how can we build effective policies to improve public health without shaming individuals or fueling disordered eating?

In this episode of The Ty Beal Show, Chris van Tulleken, MD, PhD, a professor at University College London, BBC broadcaster, and author of the bestseller Ultra Process People, joins Ty to discuss the science and politics of ultra-processed foods.

Dr. van Tulleken shares the compelling results from his own self-experiment eating a diet comprised of 80% UPFs, detailing the rapid weight gain, hormonal disruption, and surprising changes in brain connectivity it caused. We explore the intense debate around the UPF definition, why industry engineering makes these products distinct from homemade food, and how corporate profit motives are a key driver of the global obesity pandemic. Dr. van Tulleken also offers a nuanced path forward for policy—one that focuses on nutrient-based warning labels, taxation, and marketing restrictions—and shares how he balances this knowledge with real life in his own family.

Highlights from the episode include:

• What happened to Dr. van Tulleken’s body, appetite hormones, and brain on a one-month, 80% ultra-processed diet
• The scientific and policy debates surrounding the UPF definition
• How food companies engineer food for overconsumption and profit
• Why a homemade brownie is not the same as a commercially produced one
• Practical policy solutions, including warning labels, marketing restrictions, and taxation
• The parallels between the food industry and the tobacco industry
• The critical problem of industry-funded science and conflicts of interest
• Navigating a "disordered food environment" without triggering disordered eating

Dr. van Tulleken brings his rigorous scientific perspective and trademark humor to one of the most polarized issues in modern nutrition, making a powerful case that we must address corporate power and the food environment to solve diet-related disease.

Find Dr. Chris van Tulleken at University College London and get his book, Ultra Process People. Connect with Dr. van Tulleken on X and Instagram.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

How do we turn cutting-edge nutrition research into policies that improve people's lives? In this episode of The Ty Beal Show, Purnima Menon, PhD, Senior Director of Food and Nutrition Policy at IFPRI, shares her journey from reading recipe books as a child to becoming a world leader in advancing global nutrition at the intersection of science and policy.

Purnima explains why understanding people—their constraints, motivations, and contexts—is essential to creating meaningful change in food systems. We discuss the challenges of siloed thinking in nutrition, the complexities of sustainable diets, and what it takes to bridge the gap between evidence and action. Purnima brings a deeply human-centered perspective to some of the most pressing questions in food systems transformation.

Highlights from the episode include:

• Why understanding people is central to all nutrition change—whether in behavior, programs, or policy
• The biggest challenges facing global nutrition today and why we need to move beyond siloed solutions
• How dietary choices are shaped by structural constraints at the intersection of water, energy, food, and gender
• What it takes to bridge research and policy—and why both matter
• The role of policy incentives and political economy in transforming food systems

Dr. Menon brings decades of experience working with influential researchers and policymakers around the world, offering a nuanced perspective that connects evidence to real-world impact. Her work reminds us that privilege comes with responsibility—and that meaningful change requires joining the dots between science, people, and policy.

Find Dr. Purnima Menon at IFPRI and connect with her on X and LinkedIn.

Connect with Ty on X, LinkedIn, Instagram, and YouTube. Read his publications on Google Scholar. Sign up for Ty's Newsletter.

Why do ultra-processed foods make us eat more — even when calories, sugar, fat, and protein are matched? In this episode, Dr. Kevin Hall, author of Food Intelligence and one of the most influential scientists in metabolism and obesity research, breaks down the mechanisms driving overeating — and shares brand-new findings from his latest NIH study.

We dig into energy density, hyper-palatability, dopamine, food addiction, food policy, and how we can redesign the food system for real health impact — without hype or ideology. If you want clear, evidence-based answers about why we eat what we eat, this episode is for you.

Timestamps

00:00 Introduction to Food Intelligence 02:55 Dr. Kevin Hall's Journey in Nutrition 06:02 Understanding Food Intelligence 08:49 The Landmark Study on Ultra-Processed Foods 11:59 Critiques and Implications of the Study 14:56 Triangulating Evidence in Nutrition Research 18:10 Ongoing Research and Future Directions 20:49 Key Findings from Recent Trials 24:00 The Role of Food Industry in Nutrition 34:57 Incentivizing Healthy Food Choices 38:25 Understanding Ultra-Processed Foods and Health 41:49 The Neurobiology of Food Addiction 46:23 Exploring Dopamine Responses to Food 48:21 Energy Density and Hyper-Palatability 54:11 The Role of Food Environment in Diet Choices 01:00:09 Navigating the Future of Food Systems 01:08:29 Re-engineering Food for Healthier Options 01:12:03 The Carrot and the Stick Approach 01:18:22 The Role of GLP-1s in Obesity Management 01:24:19 Political Momentum for Food System Change 01:30:32 Challenges in Implementing Food Policies

Dr. Kevin Hall

X: https://x.com/KevinH_PhD LinkedIn: https://www.linkedin.com/in/kevinhall4 Website: https://www.kevinhallphd.com Book — Food Intelligence: https://a.co/d/8uRXuAv

Connect with Ty

X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Newsletter: https://www.tybeal.com

What is the definition of an ultra-processed food (UPF), and where did the concept originate? Why is the Nova classification system both a groundbreaking public health tool and a source of intense debate? And how can we use this framework to build healthier food systems around the world?

In this episode of The Ty Beal Show, Dr. Carlos Monteiro, the Brazilian epidemiologist who coined the term "ultra-processed food" and developed the revolutionary Nova classification system, joins Ty for a timely discussion. Recorded on the day of its release, they break down the new Lancet series on UPFs and human health, which Dr. Monteiro co-authored.

Dr. Monteiro shares the fascinating story of how observing Brazil's rapid rise in obesity led his team to identify a new category of foods—not just "junk," but sophisticated, engineered formulations designed to replace traditional diets. We delve into the most common critiques of the UPF concept, including the heterogeneity of the category and the challenges of identification, and Dr. Monteiro offers sharp, evidence-based rebuttals. He also outlines a pragmatic path for policy, explaining why solutions must be tailored to a country's stage of dietary transition and why we cannot rely on industry-led reformulation.

Highlights from the episode include:

• The origin story of the Nova classification system and its core principles
• A direct response to the major scientific and industry-led criticisms of the UPF concept
• Why comparing individual UPFs in observational studies is flawed—and what the evidence shows
• Practical, simplified markers for identifying UPFs in policy (think: flavors, colors, and artificial sweeteners)
• Key takeaways from the new Lancet series on ultra-processed foods and human health
• The critical difference between promoting traditional diets in some countries and rebuilding entire food systems in others
• The parallel between the UPF dietary pattern and the celebrated Mediterranean diet pattern
• Why mobilizing civil society is key to countering corporate power and passing effective policies

Dr. Monteiro brings five decades of epidemiological expertise to one of the most critical issues in modern nutrition, making a powerful case that addressing the ultra-processing of our food supply is essential to combating diet-related disease globally.

Find the new Lancet Series on Ultra-Processed Foods and Human Health online at The Lancet. Connect with Dr. Carlos Monteiro on X.

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What do we know about health, nutrition, and medicine — and how confident should we be? In this episode, Dr. Gordon Guyatt, the clinician-scientist who coined the term evidence-based medicine and co-created the GRADE framework, breaks down why so much health and nutrition guidance rests on weak foundations. We dig into the hierarchy of evidence, why observational studies so often mislead us, and what went wrong with hormone replacement therapy and antioxidant vitamins. Dr. Guyatt also explains the intense backlash to the NutriRECS red-meat guidelines and why overstating certainty erodes trust in both science and public health.

We also explore the growing influence of health influencers, why acknowledging uncertainty is essential, and how AI could both help and harm evidence-based decision-making. From the limits of nutrition research to the future of trustworthy guidelines, this conversation offers a clear, honest look at what we know — and what we don’t. If you want rigorous, hype-free insight into how evidence should inform health decisions, this episode is for you.

Timestamps

00:00 Introduction 01:10 What evidence-based medicine actually means 04:28 When low-quality evidence misleads (HRT, antioxidants) 07:29 Why most nutrition research is low certainty 11:29 The NutriRECS red-meat guidelines and backlash 17:55 How the nutrition field overstates certainty 21:02 Influencers and misinformation 23:42 AI’s role in evidence-based decision-making 31:58 Why uncertainty and humility matter 32:34 Advice for clinicians and researchers 37:14 How to make recommendations with low-quality evidence

Dr. Gordon Guyatt

X: https://x.com/GuyattGH LinkedIn: https://www.linkedin.com/in/guyattgh McMaster University: https://experts.mcmaster.ca/people/guyatt

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In this episode, Frédéric Leroy, PhD, a professor of food science and biotechnology at the Free University of Brussels, joins the show to dismantle the polarized debate surrounding animal-source foods. We explore the nutritional risks associated with restrictive vegan diets, particularly for vulnerable groups like infants and women of reproductive age, while examining the evolutionary and biological role of meat in the human diet. Dr. Leroy challenges the current push toward exclusively plant-based global policies, discussing the limitations of the EAT-Lancet report and the "carbon tunnel vision" often applied to environmental sustainability.

We also dig into the misunderstood science of saturated fat and processed meats, distinguishing between traditional preservation methods and modern ultra-processing. Dr. Leroy introduces the "Nourishment Table," a flexible, evidence-based framework for healthy eating that prioritizes nutrient density and minimizes ultra-processed foods. Finally, we discuss the concept of "ethical omnivorism" and how to balance animal welfare with the ecological realities of food production. If you want a nuanced, scientific perspective on the role of livestock in a healthy and sustainable future, this episode is for you.

Timestamps

00:00 Introduction and Guest Background

05:23 Exploring Vegan Diets: Risks and Nutritional Concerns

14:51 Health Outcomes of Vegan Diets: A Closer Look

20:04 The Debate on Animal Source Foods: Evidence and Context

24:14 Nutritional Perspectives on Meat: Myths and Realities

30:57 Processed Meats: Understanding the Nuances

36:17 Cultural and Nutritional Context of Processed Meats

39:40 The Role of Animal-Sourced Foods in Human Nutrition

42:57 Critique of EAT Lancet Dietary Guidelines

48:11 The Nourishment Table: A Flexible Dietary Framework

55:58 Ethical Considerations in Animal Food Consumption

01:03:51 Environmental Impact of Animal Agriculture

Dr. Frédéric Leroy

X: https://x.com/fleroy1974 LinkedIn: https://www.linkedin.com/in/fleroy1974/ Free University of Brussels: https://imdo.research.vub.be/en/prof-dr-ir-frederic-leroy

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In this episode, board-certified psychiatrist and "Evolutionary Psychiatry" creator Dr. Emily Deans joins the show to explore the profound connection between what we eat and how we think and feel. We discuss the limitations of a purely pharmaceutical approach to mental health and examine how an evolutionary framework—looking at the mismatch between our hunter-gatherer biology and our modern industrial environment—can offer a more complete picture of brain health. Dr. Deans breaks down the science behind the gut-brain axis, explaining how the microbiome, vagus nerve, and hormonal signals constantly communicate between our digestive system and our brain to influence mood and cognition.

We also dive into the nuances of nutritional psychiatry, moving beyond "single nutrient" studies to look at whole-diet interventions like the modified Mediterranean diet. The conversation challenges common dietary dogmas, highlighting the critical role of brain-essential nutrients often missing from plant-exclusive diets—such as creatine, B12, and iron—and why red meat may actually support mental well-being despite its controversial reputation. From the dangers of "savory frosting" (ultra-processed foods) to the link between metabolic syndrome and depression, this episode offers practical, evidence-based insights for anyone looking to support their mental health through diet.

Timestamps

00:00 Introduction

02:05 Limitations of psychiatric medications

03:00 Evolutionary mismatch & modern life

05:51 Paleo diet vs. standard advice

08:11 How diet affects mood & cognition

12:21 The gut-brain axis: Vagus nerve & microbiome

15:54 Single nutrients vs. whole diets

18:24 The SMILES trial & Modified Mediterranean Diet

20:00 Diet and hippocampus size

22:39 Red meat and creatine

23:32 Nutrients in vegan vs. omnivore diets

25:09 Understanding inflammation

28:41 Ultra-processed foods ("Savory Frosting")

29:34 Metabolic syndrome & depression

32:34 Brain metabolism & mitochondria

Dr. Emily Deans

X: https://x.com/evolutionarypsy Psychology Today: https://www.psychologytoday.com/us/contributors/emily-deans-md Private Practice: https://www.emilydeansmd.com

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Website: https://www.tybeal.com X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd

In this special episode, I share a conversation hosted by Dr. Mario Kratz, former professor at the Fred Hutch Cancer Center and founder of Nourished by Science, to unpack the recently released Dietary Guidelines for Americans. We discuss the focus on "real food" that prioritizes minimally processed nutrient-dense options, examining the move to center diets around quality protein sources and fiber-rich plants while tackling the chronic disease crisis linked to diet and lifestyle.

We examine the bold recommendations to significantly increase protein intake and the transformative language used to discourage refined grains and highly processed foods. The conversation also critiques the guidelines' stance on dietary fats, highlighting the controversy over saturated fats and the omission of seed oils, while exploring the nuances of full-fat dairy, the "food matrix" effect, and the practical challenges of implementing these changes in public policy.

Timestamps

00:00 Introduction to Dietary Guidelines Discussion

01:08 Overview of Current Health Issues

03:25 Critique of Previous Dietary Guidelines

06:30 The New Food Pyramid Explained

09:55 Protein and Fiber: The New Focus

16:15 Specific Dietary Recommendations

25:20 The Role of Dairy in Nutrition

30:03 Fruits and Vegetables: A Daily Essential

32:30 Understanding Dietary Fats and Their Impact

45:27 The Role of Whole Grains in Nutrition

51:34 Limiting Processed Foods for Better Health

58:21 Alcohol Consumption and Health Guidelines

Dr. Mario Kratz

Website: https://nourishedbyscience.com YouTube: https://www.youtube.com/@nourishedbyscience

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In this episode, rangeland ecologist Dr. Pablo Manzano of the Basque Centre for Climate Change joins the show to challenge the dominant narrative that livestock are inherently harmful to the climate and the planet. We examine the two most common critiques of animal agriculture—greenhouse gas emissions and land use—and unpack why these arguments often ignore how ecosystems actually function. Dr. Manzano introduces the concept of baseline emissions, explaining how grazing livestock largely replace the ecological role once filled by vast populations of wild herbivores, meaning many methane emissions attributed to livestock are part of natural, unavoidable ecosystem processes rather than purely human-caused additions.

We also explore why land use itself is not inherently negative, how undergrazing and land abandonment can increase wildfire risk and ecological degradation, and why mobile pastoralism may be one of the most effective tools for conserving rangelands while producing food. The conversation critiques conventional life cycle assessments (LCAs), highlighting how “carbon tunnel vision” and simplistic accounting can lead to misguided policy recommendations. If you’re looking for a more nuanced, ecosystem-based perspective on livestock, climate change, and sustainable food systems, this episode offers a powerful reframing of the debate.

Timestamps

00:00 Introduction to Livestock and Ecosystem Conservation

02:30 The Role of Herbivory in Ecosystem Dynamics

06:05 Understanding Baseline Emissions from Wild Herbivores

15:50 The Complexity of Livestock Emissions and Management

18:24 Comparative Emissions: Livestock vs. Wild Herbivores

24:58 Future of Herbivory: Rewilding and Ecosystem Restoration

26:28 Rewilding and Ecological Challenges

32:14 The Role of Livestock in Ecosystem Management

38:06 Food Security and Sustainable Practices

47:08 Rethinking Land Use and Emissions

52:04 Understanding Complexity in Nature

Dr. Pablo Manzano

X: https://x.com/PabloPastos LinkedIn: https://www.linkedin.com/in/pablo-manzano/ Basque Centre for Climate Change: https://www.bc3research.org/pablo_manzano

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In this episode, legendary food policy expert Dr. Marion Nestle joins the show to discuss her new book "What to Eat Now" and share her unfiltered take on the 2025 Dietary Guidelines for Americans. At 89 years old, Dr. Nestle brings over five decades of experience to the conversation, including her role as editor of the 1988 Surgeon General's Report on Nutrition and Health and as a member of the 1995 Dietary Guidelines Advisory Committee. We explore how supermarkets are designed to maximize spending rather than health, why the food industry's profit motive conflicts with consumer wellbeing, and why the simplest nutrition advice—eat real food, not too much, mostly plants—remains so difficult to follow.

We also dig into the controversy surrounding the new dietary guidelines, examining both what Dr. Nestle praises (the emphasis on real food and limiting ultra-processed products) and what concerns her (the meat-forward messaging and questions about equity). As a member of the Scientific Review Group that developed the scientific foundations for these guidelines, I offer an insider perspective on what the evidence actually says versus how it's been communicated. The conversation turns to implementation challenges—from school meals to SNAP policy—and asks the critical question: how do we translate good dietary guidance into meaningful change when funding for community programs is being cut? If you're interested in understanding the forces shaping American food policy and what it means for public health, this episode offers a candid, nuanced discussion from two experts coming from different perspectives on the debate.

Timestamps

00:00 Introduction to Marion Nestle's Journey

04:20 The Evolution of Food Choices

10:36 Understanding Nutrition and Consumer Choices

13:17 The Role of Dietary Guidelines

19:23 Insights on the New Dietary Guidelines

28:08 The Whole Milk Debate

30:59 Philosophy of Eating Real Foods

32:19 Equity in Dietary Guidelines

33:49 Policy Changes and School Meals

35:43 Plant-Based vs. Animal Protein

39:37 Messaging and Public Perception

41:22 Conflicts of Interest in Guidelines

44:43 Evidence and Scientific Review

47:36 Implementation Challenges in Schools

52:41 Future of Dietary Guidelines

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, Dr. Mark Hyman joins me to unpack his new book Food Fix Uncensored and the revolution in American food policy—chronic disease, ultra‑processed food, SNAP reform, new dietary guidelines, and more. With over three decades of experience in functional medicine and a track record of advising policymakers at the highest levels, Dr. Hyman offers an insider's perspective on what he calls "the most exciting moment" in his career—a time when the ideas he once thought would take generations to implement are suddenly becoming reality. We explore why chronic diseases that barely existed 150 years ago now affect nine in ten Americans, how ultra-processed foods bypass our biology's natural satiety mechanisms, and the powerful story of a South Carolina family on food stamps who transformed their health by simply learning to cook real food.

We also dig into the unprecedented policy changes reshaping the American food landscape—from SNAP waivers allowing states to restrict soda purchases to the new dietary guidelines that for the first time call out highly processed foods. The conversation turns to implementation: mandating nutrition education in medical schools, reforming agricultural policy, changing food marketing to children, and funding $100 million in functional medicine research through Medicare. Whether you're a healthcare professional, policymaker, or someone trying to navigate the modern food environment, this episode offers a candid roadmap for the revolution that's already underway—and how you can be part of it.

Timestamps

00:00 Introduction to Dr. Mark Hyman

01:22 The Evolution of Food Fix

06:28 Chronic Diseases: A Systemic Issue

10:19 The Role of Food Policies

17:28 Understanding Ultra-Processed Foods

20:44 Functional Medicine and Patient Care

23:48 The Need for Nutrition Education in Medicine

26:05 Historic Dietary Guidelines and Processed Foods

31:14 The Multifactorial Approach to Public Health

39:04 Transforming Food Policies and Community Engagement

Food Fix Uncensored: https://foodfixuncensored.com

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, Dr. Michael Goran—one of the leading scientists behind the 2025 Dietary Guidelines for Americans—joins the show to reveal what the evidence says about highly processed foods, refined grains, and added sugars. As the researcher who led three critical umbrella reviews that shaped these landmark guidelines, Dr. Goran walks us through the methodology behind the recommendations and shares findings that may surprise you: a 10% reduction in highly processed food intake can lower diabetes risk by 14%, replacing just one serving of refined grains with whole grains reduces mortality risk by 13%, and cutting one sugary beverage per day can slash diabetes risk by 26%. We also explore a paradigm shift in nutrition science—the idea that the burden of proof should now fall on highly processed foods to demonstrate safety, rather than requiring whole foods to prove their benefit.

The conversation gets practical when we dig into what these findings mean for families. Dr. Goran challenges some of the guidelines' recommendations (like avoiding all added sugars until age 10) while strongly endorsing others—particularly the emphasis on eliminating liquid sweetness from children's diets, including fruit juices, sports drinks, and even diet sodas, which show concerning links to all-cause mortality. We discuss "kitchen processing" as an alternative to factory-processed foods, the importance of developing basic cooking skills, and why the first few days of dietary change are the hardest but also the most rewarding. If you want to understand what the new dietary guidelines mean for your health and your family, this conversation offers both the science and the practical wisdom to make meaningful changes.

Timestamps

00:00 Introduction to Dietary Guidelines

01:11 Understanding Highly Processed Foods

04:56 Findings on Highly Processed Foods

13:02 Exploring Whole Grains and Refined Carbs

18:12 The Impact of Added Sugars and Beverages

29:43 Final Thoughts on Dietary Changes and Policy

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, nutrition scientist Dr. Mario Kratz—creator of the popular YouTube channel Nourished by Science—joins the show for a deep dive into metabolic health and what you can actually do to prevent chronic disease. After 25 years in academic research conducting rigorous randomized controlled trials, Dr. Kratz left academia to bring unbiased, evidence-based nutrition science directly to the public—free of supplements, sponsors, and dietary tribes. We explore why your doctor's standard blood work may be missing the single most important marker of metabolic health, how your body performs the extraordinary feat of keeping just a teaspoon and a half of sugar in your entire blood supply, and why hundreds of millions of people worldwide are walking around with undetected insulin resistance that silently raises their risk of heart disease, diabetes, and cancer.

We also unpack the practical side: why ultra-processed foods are engineered to override your body's satiety signals, how liquid calories from soda, juice, and alcohol trick you into eating more without feeling fuller, and the surprisingly simple habits—like a walk after dinner or eating protein and fiber before starch—that can dramatically improve your blood sugar regulation. Dr. Kratz makes a compelling case for resistance training as one of the most underrated tools for long-term metabolic health, especially for anyone on a weight loss program. Whether you're trying to optimize your own health or just make sense of the noise in the nutrition space, this conversation is a masterclass in cutting through the confusion.

Timestamps

00:00 Transitioning from Academia to YouTube

11:49 Understanding Metabolic Health

23:47 Key Indicators of Metabolic Health

37:50 Understanding Insulin Resistance

42:36 The Role of Continuous Glucose Monitors

51:50 The Importance of Triglycerides

57:54 Exploring Low-Grade Chronic Inflammation

01:13:48 Diet and Lifestyle Factors for Metabolic Health

01:20:13 The Impact of Ultra-Processed Foods

01:26:56 Strategies for Managing Blood Sugar Levels

01:35:35 The Role of Exercise in Metabolic Health

01:43:08 Integrating Healthy Habits into Daily Life

Dr. Mario Kratz's YouTube channel: youtube.com/@nourishedbyscience

Dr. Mario Kratz's website: https://nourishedbyscience.com

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, preventive cardiologist Dr. Bret Scher—medical director of Metabolic Mind and the Coalition for Metabolic Health—joins the show for a wide-ranging conversation on why mainstream cardiology has been getting heart disease prevention wrong. After years of practicing conventional medicine, Dr. Scher had his worldview upended when he discovered the power of low-carb and ketogenic diets to reverse the metabolic dysfunction driving most cardiovascular disease. We explore why LDL alone doesn't tell the full story, what ApoB reveals that your standard lipid panel misses, and why metabolic health—not just cholesterol—may be the most important predictor of heart disease risk.

We also dig into the real trade-offs of GLP-1 drugs, why they shouldn't replace lifestyle interventions, and the groundbreaking field of metabolic psychiatry—where ketogenic diets are being used to treat bipolar disorder, schizophrenia, and major depression by addressing energy dysfunction in the brain. Dr. Scher shares how the Coalition for Metabolic Health is pushing to reshape dietary guidelines and medical training to prioritize metabolic health, and why the newly updated Dietary Guidelines for Americans finally acknowledging low-carb diets marks a turning point. Whether you're navigating your own heart health, questioning the standard medical advice, or curious about the link between metabolic health and mental health, this conversation is packed with insights you won't hear in a typical doctor's visit.

Timestamps

00:00 The Shift in Dietary Perspectives

02:45 Understanding Patient Responses to Low Carb Diets

05:37 The Push for Mainstream Acceptance of Low Carb Diets

08:36 Reevaluating Heart Disease Prevention

11:37 The Role of Cholesterol in Heart Health

14:48 Dietary Interventions for Metabolic Conditions

17:45 Navigating Cholesterol Levels and Medications

22:20 The Role of GLP-1 Drugs in Weight Management

28:16 Understanding Metabolic Psychiatry

35:40 Advocacy for Metabolic Health Policy

40:00 Key Takeaways for Improving Health

Metabolic Mind YouTube channel: https://www.youtube.com/@metabolicmind

Metabolic Mind website: https://www.metabolicmind.org

Coalition for Metabolic Health: https://coalitionformetabolichealth.org

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, Harvard professor and obesity researcher Dr. David Ludwig joins the show to discuss his new paper "Overcoming Impasse in Nutrition Science," published today in Cell Metabolism (https://doi.org/10.1016/j.cmet.2026.01.013). Dr. Ludwig—author of the New York Times bestseller Always Hungry and one of the leading proponents of the carbohydrate-insulin model of obesity—uses the framework of science philosopher Thomas Kuhn to explain why paradigm clash in nutrition has stagnated into paralysis. We walk through the carbohydrate-insulin model versus the energy balance model, then dig into two highly cited clinical trials at the center of this debate: his group's 2018 BMJ feeding study and the 2021 Nature Medicine crossover trial—and why, despite publicly available data, the field has failed to resolve the competing claims from either study.

We then turn to what a path forward looks like: why ad hominem attacks poison the trust needed for collaboration, how professional societies and funders could incentivize adversarial collaboration between opposing researchers, and what a definitive long-term feeding study would need to look like to settle these foundational questions. Whether you follow the carbohydrate-insulin debate closely or just want to understand why nutrition experts can't seem to agree, this conversation is a candid call for humility, rigor, and scientific renewal.

Read Dr. Ludwig's paper on wash-in and washout effects in dietary trials: https://www.bmj.com/content/389/bmj-2024-082963

Timestamps

00:00 Introduction to the Carbohydrate-Insulin Model

11:00 Debate and Polarization in Nutrition Science

17:28 Defining a Path Forward in Nutrition Research

25:40 Unraveling Scientific Discrepancies

33:50 Bridging Paradigms: The Need for Collaboration

39:39 The Role of Humility in Scientific Discourse

45:44 Towards Constructive Scientific Engagement

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, nutrition scientist Dr. Chris Masterjohn—one of the original voices behind the vitamins A, D, and K balance framework—joins the show for a wide-ranging conversation on bone health, mitochondrial function, and rethinking longevity. We start with a deep dive into why vitamins A, D, and K need to work together as equal partners, how the internet's growing hostility toward vitamin A has reached what Dr. Masterjohn calls a "blow-off top," and why most people probably aren't converting plant-based carotenoids into retinol nearly as well as they think. From there, we explore his first rule of health—think about your mitochondria first—and how the mitochondrial respiratory chain is the final destination where everything you eat becomes the energy currency your body uses to maintain, repair, and rebuild itself. He explains the virtuous and vicious cycles that link energy production and nutrient adequacy, and why his Mitome test is designed to give people actionable, personalized insights rather than just a generic score.

We also get into Dr. Masterjohn's provocative take on longevity: that maximizing your current peak performance is a far better strategy than reverse-engineering what you want to be able to do at 100. He makes a fascinating case using bone mass data, the surprising eight-year longevity advantage of gymnasts and pole vaulters over the general population, and a compelling theory connecting functional movement to immune function and cancer protection through T cell motor proteins. We close with practical wisdom on how to avoid the yo-yo effect in health optimization—maintaining past gains with minimal daily effort while progressively working on your weakest link—and why investing in high-quality testing and interpretation early pays off far more than most people realize.

Timestamps

00:00 Introduction

00:22 Vitamins A, D, and K: Why They Work Together

04:33 The Internet's War on Vitamin A

06:50 Carotenoid-to-Retinol Conversion Problems

10:18 Key Nutrients for Bone Health

16:24 Rule #1: Think About Your Mitochondria First

23:06 The Mitome Test: Actionable Mitochondrial Insights

27:05 A Layered Approach to Nutritional Testing

33:00 Why Peak Performance Beats Reverse-Engineering Longevity

36:30 Gymnasts Live 8 Years Longer Than Average

38:00 T Cells, Motor Proteins, and Functional Movement

41:16 The Dirty Secret of Longevity Science

43:36 Working Toward a Handstand at Any Age

46:12 Injuries, Energy Budgets, and Vicious Cycles

51:30 The Yo-Yo Effect: How to Maintain What You've Built

54:19 Find Your Weakest Link

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, NYT bestselling author and health journalist Max Lugavere joins the show in person in Phoenix for a wide-ranging conversation on brain health, dementia prevention, and the foods that protect your mind. After his mother was diagnosed with a neurodegenerative condition in her fifties, Max left his journalism career to investigate the science of brain health—a mission that produced three bestselling books, the hit podcast The Genius Life, and the acclaimed documentary Little Empty Boxes. We explore the 2024 Lancet Commission’s finding that 45% of dementia cases may be preventable, the specific nutrients the brain needs—from omega-3 fatty acids and carotenoids to anthocyanins, vitamin E, and creatine—and why ultra-processed foods are now being directly linked to increased dementia risk.

We also get into what Max has changed his mind about, including his earlier emphasis on carbohydrates and the insulin model of obesity, and why he now sees energy balance and ultra-processed food consumption as the real drivers of metabolic disease. The conversation covers practical strategies for eating better—including Max’s concept of reducing “friction” in the kitchen—as well as the outsized benefits of walking and resistance training for both metabolic and brain health. Max also shares the deeply personal story behind his documentary Little Empty Boxes, a 10-year tribute to his mother and the evolving science of dementia prevention. Whether you’re looking to optimize your brain health or simply eat better with less effort, this conversation is packed with actionable insights grounded in the latest science.

Timestamps

00:00 Introduction & Max’s Origin Story

04:49 Dementia Prevention: The Lancet Commission & Modifiable Risk Factors

08:08 Brain-Boosting Foods: Omega-3s, Fatty Fish & Nutrient Deficiencies

13:23 Carotenoids, Anthocyanins & the Power of Plant Pigments

20:03 The “Dark Matter” of Food: Unstudied Compounds in Whole Foods

23:24 Creatine for Brain Health: New Research on Cognition & Alzheimer’s

28:05 Saturated Fat, Red Meat & Dairy: A Nuanced View

31:25 What Max Changed His Mind About: Carbs, Insulin & Obesity

36:43 Exercise, Resistance Training & Walking for Brain Health

43:27 NEAT, Movement & Why We’ve Outsourced Our Activity

49:05 Simple Cooking Tips: Reducing Friction in the Kitchen

55:58 Little Empty Boxes: The Documentary About His Mother’s Dementia

Max Lugavere’s YouTube channel: https://www.youtube.com/@maxlugavere Max Lugavere’s website: https://www.maxlugavere.com

Connect with Ty

YouTube: https://www.youtube.com/@TyBealPhD X: https://www.x.com/TyBealPhD LinkedIn: https://www.linkedin.com/in/tybeal Instagram: https://www.instagram.com/tybealphd Website: https://www.tybeal.com

In this episode, evolutionary anthropologist Dr. Herman Pontzer—one of the world's leading researchers on human metabolism and energy expenditure at Duke University—joins the show to share what decades of fieldwork with the Hadza hunter-gatherers of Tanzania have revealed about how our bodies really work. We explore what hunter-gatherers actually eat (spoiler: it's not the all-meat paleo diet you've been sold), why the healthiest hearts ever measured belong to a community whose staple foods are unrefined carbohydrates, and the shocking finding that the Hadza—despite walking up to 19,000 steps a day—burn no more calories than sedentary Americans. Dr. Pontzer explains his groundbreaking "constrained energy" model and why your body quietly reallocates energy from inflammation, stress hormones, and reproductive functions when you exercise more, rather than simply burning extra fuel.

We also dive into Dr. Pontzer's landmark Science paper on metabolism across the human lifespan, which upends the popular belief that a slowing metabolism causes middle-age weight gain. The data from over 6,000 people show that your metabolic rate holds remarkably steady from your mid-20s all the way into your late 50s—meaning diet, not metabolism, is what's really driving the obesity crisis. Dr. Pontzer shares practical takeaways: prioritize minimally processed foods, get your fiber and protein, and stop blaming your metabolism for weight gain. The conversation closes with a powerful reflection on what modern life has lost—community, presence, and a healthier relationship with time—drawn from his years living among the Hadza. Dr. Pontzer also introduces his new book Adaptable, a guide to understanding human biology through the lens of evolution.

Timestamps

00:00 Introduction to Human Metabolism and Energy Expenditure

02:35 Hunter-Gatherer Diets: What Do They Really Eat?

09:38 The Role of Honey in the Hadza Diet

10:25 Translating Evolutionary Diets to Modern Contexts

12:14 Health Status of Hunter-Gatherers

14:50 Lipid Profiles and Heart Health in Hunter-Gatherers

19:26 Adaptations of Arctic Diets: The Inuit Example

21:45 Variability in Animal Source Foods Among Hunter-Gatherers

24:29 Debunking Dietary Myths

29:11 Energy Expenditure and the Hadza

32:58 Metabolism Across the Lifespan

42:07 Nutritional Insights from Hunter-Gatherers

47:14 Lessons from the Hadza: Community and Time

50:14 Introducing 'Adaptable': Understanding Human Biology

Herman Pontzer’s Book, Burn: https://www.amazon.com/Burn-Research-Really-Calories-Healthy/dp/0525541527

Herman Pontzer’s Book, Adaptable: https://www.amazon.com/Adaptable-Unique-Really-Biology-Unites/dp/0593539303

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In this episode, Professor Tim Spector—epidemiologist at King's College London, co-founder of ZOE, and one of the world's most cited scientists—joins the show to share what 15 years of pioneering microbiome research has revealed about human health. We start with the finding that upended his career: identical twins, despite sharing 100% of their DNA and a childhood home, share only about 25% of their gut microbe species—meaning 75% of your microbiome is entirely unique to you. From there, we explore the landmark ZOE feeding study of 1,000 twins, which found up to a tenfold difference in blood fat and glucose responses to identical meals, and Tim's new Nature paper on 30,000 ZOE participants that introduces a more sophisticated gut health scoring system—moving beyond crude diversity metrics to a ratio of beneficial to harmful microbes linked to immune function, metabolism, and body composition. We also break down the difference between prebiotics and probiotics, why Tim's Biome trial found prebiotics deliver roughly 9–10 times more benefit to gut health scores than a standard lactobacillus probiotic, and how just small, regular amounts of fermented foods can reduce inflammatory markers by up to 25%.

The second half of the conversation turns to practical application. Tim walks through his six core principles for gut-centered eating—including why 30 different plants per week is the sweet spot, how to eat the rainbow for polyphenols, why calories are a misleading lens for evaluating food, and how pivoting your protein toward high-fiber legumes serves both muscle and microbiome. We dig into the surprising science on coffee (it's a fermented bean, packed with 600+ polyphenols, a source of fiber, and linked to a 20–25% reduction in heart disease and stroke risk), the specific additives and hyper-palatability tricks that make ultra-processed foods uniquely harmful beyond just their calorie content, and the emerging science of the gut-brain axis—where 80% of vagal nerve signals travel from the gut to the brain, and where gut-friendly diets are now showing effects comparable to antidepressants in clinical trials. Tim also shares his thinking on why rates of bowel cancer in people in their 30s and 40s have tripled, and what that signals about a generation raised on ultra-processed food.

Timestamps

00:00 The Microbiome Revolution Begins

02:39 Understanding Gut Microbiome Diversity

05:47 Personalized Nutrition and Microbiome Clusters

08:46 Causation vs Correlation in Microbiome Research

11:33 Prebiotics vs Probiotics: Understanding Their Roles

14:41 Personalized Nutrition Insights from Microbiome Testing

17:37 The Importance of Dietary Diversity

20:47 Mindful Eating and Technology's Role

23:44 Challenges of Fiber in Diets

29:32 Transitioning to a High Fiber Diet

34:03 The Importance of Long-Term Dietary Changes

36:33 Key Principles for a Healthy Diet

41:14 The Role of Coffee in Gut Health

48:19 Understanding Ultra-Processed Foods

52:46 The Gut-Brain Connection

57:46 Dietary Risks for Bowel Cancer

Zoe: https://zoe.com/en-us

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In this episode, Professor John Speakman—biologist at the University of Aberdeen and the Chinese Academy of Sciences, and one of the world's foremost experts on energy balance—joins the show to reveal what a 1,200-mouse feeding study and 30,000 human data points have uncovered about why we really gain weight. The answer isn't fat alone and it isn't carbs alone—it's a specific combination of the two, around 40–50% fat and 20–30% carbohydrate by calories, that sits at the peak of a "mountain" of weight gain. John explains why both low-fat and low-carb diets work (they're descending opposite sides of the same mountain), and then drops the evolutionary bombshell: that peak maps almost perfectly onto the macronutrient composition of breast milk—a reward signal hardwired into our brains from infancy that was never switched off because, until the modern food environment, no natural food matched it. We also dig into why John doesn't find the carbohydrate-insulin model convincing, his attempts to replicate David Ludwig's glycemic index findings, and why he believes adversarial collaborations are the only way to break the impasse in nutrition science.

The second half covers the deeper forces behind the obesity pandemic. John walks through his doubly labeled water analysis of over 6,000 people showing that physical activity hasn't actually declined—instead, basal metabolic rate has quietly dropped over the past century, with two surprising potential drivers: reduced infection burden and the dietary shift from saturated animal fats to linoleic acid–rich seed oils. We explore why people underreport about 30% of what they eat and why that error gets worse at higher BMIs, making diet-disease epidemiology far shakier than most authorities acknowledge. John then lays out his "drifty gene" hypothesis—a provocative alternative to the thrifty gene idea, arguing that once early humans eliminated predators, the upper limit on body weight drifted apart across the population with no selective pressure to rein it in. We close with his "clean cupboards" framework for calorie restriction and longevity: the body isn't strategically investing in repair—it's just trying to survive until tomorrow, cleaning out junk proteins and dead cells along the way, with real benefits but also real trade-offs in immune function and wound healing.

Timestamps

00:00 Introduction to Energy Balance and Doubly Labeled Water

07:36 Surprising Findings on Energy Expenditure Across Lifespan

12:48 The Obesity Epidemic: Intake vs. Expenditure

18:59 Declining Basal Metabolic Rate: Causes and Implications

22:53 Dietary Composition: The Role of Macronutrients in Weight Gain

34:17 The Role of Breast Milk in Reward Systems

37:52 Dietary Flexibility and Cultural Variations

38:20 Debating the Carbohydrate Insulin Model

45:46 The Need for Collaborative Research in Nutrition

49:41 Challenges in Dietary Reporting and Accuracy

56:39 The Drifty Gene Hypothesis vs. Thrifty Gene Hypothesis

01:13:05 Caloric Restriction and Longevity: The Clean Cupboards Concept

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In this episode, nutrition researcher Flaminia Ortenzi—PhD candidate and longtime colleague at the Global Alliance for Improved Nutrition (GAIN)—joins the show to break down the Nutritional Value Score (NVS), a new food rating system we co-developed and recently published in the Journal of Nutrition that scores foods from 1 to 100 based on both nutrient density and protection from chronic diseases. Flaminia walks through the seven components that make up the score—vitamins, minerals, protein quality, omega-3s, fiber, calorie density, and nutrient ratios like sodium-to-potassium and saturated-to-unsaturated fat—and explains why existing systems like Nutri-Score and Health Star Rating fall short, often giving high marks to sugary cereals while penalizing sardines. We reveal the top-scoring food groups (dark green leafy vegetables, organ meats, and fatty fish), the single food that scored a perfect 100 (it's not what you'd expect), and why both low-carb and plant-based camps have found reasons to disagree with us—which we take as a sign the system is working.

The second half digs into the practical applications and honest limitations. Flaminia explains how the NVS was designed to guide food policy and programs globally—helping organizations decide which foods to promote in markets, supply chains, and consumer awareness campaigns—and how it could be adapted for front-of-package labeling and mobile apps. We discuss the enormous challenge of food composition data gaps, especially for indigenous and traditional foods where the only nutritional data comes from individual papers at local universities. Flaminia also addresses the system's key limitation as a relative score that shifts when the dataset changes, why beef scores a surprisingly solid 59 for different reasons than soy milk's 61, and how using nutritional value as the functional unit in environmental and affordability assessments completely reshuffles the conventional rankings—with fish and even ruminant meat often outperforming legumes and nuts per unit of nutritional value delivered.

Timestamps

00:00 Introduction to Nutritional Value Score (NVS)

02:29 Development and Evolution of NVS

05:30 Components of the Nutritional Value Score

08:21 Tailoring NVS for Specific Populations

11:20 Challenges in Food Composition Data

14:15 Top Scoring Foods and Nutritional Insights

17:28 Lowest Scoring Foods and Dietary Implications

20:27 Applications of NVS in Policy and Programs

23:36 Understanding Nutri-Score and Health Star Rating

27:30 The Role of Mobile Apps in Food Choices

29:35 Challenges in Data Collection for Food Scoring

31:17 Limitations of the Nutritional Value Score System

33:45 Debating the Scores of Whole Grains and Dairy

36:44 Comparing Nutritional Quality: Beef vs. Soy Products

44:30 Integrating Nutritional Value in Environmental Assessments

Nutritional Value Score Rates Foods Based on Nutrient Density and Noncommunicable Disease Prevention: https://jn.nutrition.org/article/S0022-3166(26)00092-1/fulltext

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