The Metabolic Classroom with Dr. Ben Bikman
Welcome to The Metabolic Classroom, a nutrition and lifestyle podcast focused on metabolism, which is how our bodies use energy, and the truth behind why we get sick and fat. Every week, Dr. Ben Bikman shares valuable insights that you can apply in your own life and share with friends and loved ones. The Metabolic Classroom is brought to you by BenBikman.com and InsulinIQ.com. Hosted on Acast. See acast.com/privacy for more information.
Why Alzheimer’s May Be a Metabolic Disease
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Topic:
Alzheimer’s disease has traditionally been explained by the buildup of amyloid plaques in the brain, but growing evidence suggests this theory does not fully account for the disease or lead to effective treatments. A metabolic perspective proposes that Alzheimer’s may instead be driven by brain insulin resistance, which disrupts neuronal energy metabolism—while the brain’s ability to use ketones as an alternative fuel remains intact, offering potential...
The Personal Fat Threshold Explained and Ethnicity’s Impact
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Topic:
Metabolic disease is driven more by fat cell size and adipose tissue dysfunction than by total body fat. Ethnicity, genetics, and personal fat storage capacity determine when fat becomes metabolically dangerous.
Summary:
Dr. Bikman explores a profound but underappreciated truth in metabolic health: it is not how much fat you have that determines disease risk — it is how your fat is stored and how large yo...
How Bile Controls Insulin, GLP-1, and Fat Burning
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Topic:
Bile acids are powerful hormone-like signaling molecules that regulate liver fat, glucose production, insulin sensitivity, energy expenditure, inflammation, and GLP-1 release through FXR and TGR5 receptors. Gallbladder function and bile acid signaling play a far greater role in metabolic health than most people realize.
Summary:
Ben explores a largely overlooked metabolic regulator: bile acids. While bile is commonly understood as a digestive fluid that helps...
LDL Isn’t the Problem? The Real Drivers of Heart Disease
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Topic:
LDL cholesterol is a weak predictor of heart disease compared to markers of insulin resistance, metabolic syndrome, and the triglyceride-to-HDL ratio. True cardiovascular risk is driven far more by metabolic dysfunction than by cholesterol numbers alone.
Summary:
In this episode, Ben challenges the long-standing belief that LDL cholesterol is the primary driver of heart disease. While LDL has dominated cardiovascular conversations for decades, large-scal...
Why Exercise Benefits Every Organ — Not Just Muscle
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Topic:
Exercise prompts your muscles to release extracellular vesicles — tiny molecular packages that deliver health-boosting instructions to your brain, liver, fat, and more. These signals improve metabolism, reduce inflammation, and may even help reverse insulin resistance and obesity-related damage.
Summary:
Dr. Ben Bikman explains how extracellular vesicles (ECVs) — tiny biological packages released by cells — are revolutionizing our understanding of how exercise improves metabolic health. These vesicles act like molecul...
How Glucose Overload Breaks Your Metabolism (And How to Fix It)
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This episode explores how the NAD⁺/NADH ratio acts as a key metabolic switch, where excess NADH—often driven by high glucose intake—leads to insulin resistance and cellular dysfunction. Ben highlights how lifestyle changes, not supplements, offer the most effective way to restore balance and protect metabolic health.
Summary:
In this mini lecture, Dr. Bikman explains the critical role of the NAD⁺ to NADH ratio in c...
Why Your Cells Age (And What You Can Do About It)
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Ben explains how AMPK and mTOR are critical regulators of aging and metabolism, and how their balance can be influenced by diet and lifestyle. Instead of drugs like rapamycin, strategies like carbohydrate restriction and ketosis offer a safer path to optimizing longevity.
Summary:
In this Metabolic Classroom mini lecture, Dr. Bikman explores two of the most important molecular “switches” that regulate how cells age, grow, and...
Separating Nicotine from Smoking: Myths, Metabolism, and Medicine
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Nicotine may not be the addictive villain it's made out to be. When separated from cigarette smoke, it shows surprising anti-inflammatory and neurological potential.
Summary:
In this Metabolic Classroom mini lecture, Dr. Ben Bikman revisits the molecule nicotine—not as an endorsement to use it, but to explore its distinct effects when separated from harmfu...
The Hidden Power of Ketones: Fueling + Signaling
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References:
For complete show notes and references, we invite you to become an Insider subscriber. You’ll enjoy real-time, livestream Metabolic Classroom access which includes live Q&A with Ben after the lecture, unlimited access to Dr. Bikman’s Digital Mind, ad-free podcast episodes, show notes and references, and online, live Office Hours access with Ben. It also includes Ben’s Weekly Research Review Podcast.
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GLP-1 Isn’t Enough: Why Glucagon is the Key to Lasting Weight Loss
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In this lecture, Dr. Ben Bikman explores the misunderstood role of glucagon, insulin’s often-overlooked metabolic counterpart.
While insulin encourages fat storage and glucose uptake, glucagon signals the body to mobilize and burn stored energy. Contrary to popular belief, glucagon does not stimulate fat release from adipose tissue in humans. Instead, its fat-burning effects occur primarily in the liver, where it enhances fatty acid oxidation, ketone production, and energy expen...
Stop Metabolic Inflammation at the Source: Your Gut
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In this Metabolic Classroom lecture, Ben explains how lipopolysaccharides (LPS)—toxic molecules from gram-negative gut bacteria—can escape into the bloodstream through a compromised intestinal lining, triggering chronic low-grade inflammation and insulin resistance.
Dr. Bikman breaks down the roles of tight junction proteins like ZO-1, oc...
Boost Testosterone Naturally: Mitochondria, Insulin, and Fighting Back
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In this episode Dr. Bikman explores the concept of “male menopause,” more accurately termed andropause. While women experience a dramatic hormonal drop-off due to the depletion of ovarian follicles, men experience a gradual decline in testosterone, primarily because their testosterone-producing Leydig cells become less efficient with age. This slow reduction begins in the 30s or 40s, and free testosterone (the biologically active form) declines even faster than total testosterone due to increas...
How Omega-3s Supercharge Fat Loss and Muscle Gain
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In this mini lecture, Dr. Bikman explains the powerful metabolic effects of long-chain omega-3 fatty acids—specifically EPA and DHA—on fat metabolism and muscle growth.
Ben starts by clarifying the difference between plant-based ALA and animal-based EPA/DHA, emphasizing that only the latter provide meaningful metabolic benefits. Plant-based ALA converts very poorly into EPA/DHA, making direct consumption of animal sources (like fatty fish or pasture-raised...
Ketones and Your Heart - How Ketones Protect the Cardiovascular System
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In this Metabolic Classroom mini lecture, Dr. Bikman explores the powerful effects of ketones—particularly beta-hydroxybutyrate (BHB)—on the cardiovascular system. While ketones are typically thought of as a backup fuel, Ben explains how they are, in fact, an adaptive and efficient energy source that can support heart function in both healthy and failing states.
Ben breaks down groundbreaking studies showing that ketones increase cardiac output, reduce vascular resistance, and improve heart function—especially in heart failure cases. He highlights the unique ability of BHB to reduce “afterload,” or the res...
Plant Protein vs Animal Protein: What the Science Really Says
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In this mini-lecture, Ben explores the biochemical and physiological differences between plant and animal proteins—avoiding environmental or ethical debates and focusing strictly on metabolism and human health. He breaks down essential amino acids, emphasizing that animal proteins are "complete" sources, while most plant proteins fall short—particularly in leucine, which is vital for muscle protein synthesis.
Dr. Bikman also discusses digestibility and bioavailability, explaining why animal proteins are more efficiently absorbed than plant sources. He introduces the DIAAS scoring system and details studies showing how much less effe...
Why Women Enter Ketosis Faster Than Men - What the Science Reveals
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In this lecture, Dr. Bikman explores how ketogenesis—our body's ability to produce ketones from fat—operates differently in men and women. While the foundational metabolic machinery is the same, hormonal influences, fat distribution, and physiological demands like pregnancy and lactation create meaningful divergences in how each sex mobilizes fat and enters ketosis.
Women typically exh...
How Ketones Help the Brain Recover From Concussions
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In this mini lecture Dr. Bikman explores how concussions cause more than just structural damage to the brain—they create a serious metabolic energy crisis.
A concussion reduces the brain’s ability to use glucose by impairing glucose transporters and glycolytic enzymes, leaving neurons starved for energy just when demand spikes. This disruption persists even after initial symptoms fade and c...
The Power of Plasmalogens: Boost Metabolism & Improve Insulin Sensitivity
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In this Metabolic Classroom lecture, Dr. Bikman explains the crucial role of plasmalogens—a unique type of fat found in the membranes of cells, especially in metabolically active tissues like the brain, heart, and fat cells.
These special fats help keep cells flexible, support insulin signaling, protect against oxidative stress, and even regulate energy production by stabilizing mitoc...
Ketogenesis & Stress: Can Stress Hormones Actually Be Good For You?
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In this Metabolic Classroom lecture, Dr. Bikman explores the deep biochemical relationship between stress and ketone production, uncovering how the body interprets stress signals as cues to mobilize fat and create ketones.
He explains how stress hormones—like epinephrine, cortisol, glucagon, and growth hormone—aren’t just emergency signals but actually metabolic adaptation hormones that help the body shift into fat-burning mode. Through the sympathetic nervous system and hormone cascades, the body responds to stress by increasing lipolysis and triggering ketogenesis, even during...
Why the Glycocalyx is a Hidden Key to Metabolic Health & How to Protect It
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In this Metabolic Classroom lecture, Dr. Bikman explores the often-overlooked but metabolically vital glycocalyx—a carbohydrate-rich layer coating nearly every cell in the human body. Far from being just a structural feature, the glycocalyx influences nutrient absorption, immune response, vascular function, inflammation, and even how fat cells grow and behave.
Ben explains how this sugar-rich matrix is built from glycoproteins and glycosaminoglycans and how it's found in tissues like the gut, blood v...
The Pancreas: Our Most Underrated Metabolic Organ & Why Its Health is Vital
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In this episode of Metabolic Classroom, Ben Bikman takes a detailed look at the pancreas, a small but mighty organ with two major roles—endocrine and exocrine. The endocrine pancreas (just 1–2% of its mass) regulates metabolism by secreting hormones like insulin, glucagon, somatostatin, pancreatic polypeptide, and ghrelin. These hormones work together in a push-pull fashion to control blood sugar, fat storage, appetite, and nutrient use. Importantly, the flow of blood from endocrine tissue directly into...
How Your Nervous System Controls Metabolism: Fight or Flight vs Rest & Digest
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In this foundational Metabolic Classroom lecture, Dr. Ben Bikman unpacks the vital role of the autonomic nervous system (ANS) in maintaining health and metabolic balance.
The ANS, a part of the peripheral nervous system, regulates involuntary processes such as heart rate, digestion, respiratory rate, and blood pressure—largely without conscious control. It's divided into two branches: the sympathetic (fight or flight) and parasympathetic (rest and digest) systems.
Dr. Bikman f...
Honey & Maple Syrup vs. Sugar: What’s Better for Metabolic Health?
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In this episode of the Metabolic Classroom, Dr. Ben Bikman explores whether natural sweeteners like honey and maple syrup might be better metabolic alternatives to table sugar. He begins with a fascinating historical background, including honey’s use as a wound-healing agent in World War I, and transitions into modern research that investigates their effects on blood sugar, insulin, weight, and satiety.
Unlike refined sugar, both honey and maple syrup contain anti...
The Truth About Statins & Women’s Health: Can They Harm More Than They Help?
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In this important Metabolic Classroom lecture, Dr. Bikman examines the use of statins in women, particularly for primary prevention of cardiovascular disease.
While statins are widely prescribed to lower LDL cholesterol and ApoB levels, Ben highlights research showing that these markers are weak predictors of cardiovascular risk in women. In contrast, metabolic markers like insulin resistance and type 2 diabetes are far more predictive—often increasing cardiovascular risk by up to 10-fold.
Can You Build Muscle on a Low-Carb Ketogenic Diet? What the Science Says
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During this mini lecture, Dr. Bikman tackles the popular misconception that building muscle requires carbohydrates and insulin spikes. He begins by reframing insulin's role—not as a muscle-building hormone, but primarily as an anti-catabolic signal that helps prevent muscle breakdown.
Contrary to long-held beliefs, insulin doesn’t directly stimulate muscle protein synthesis, even at high levels. Instead, the real muscle-building heroes are essential amino acids, particularly leucine, which directly activate mTOR and stimu...
What Migraine Sufferers Need to Know About Metabolism & Insulin Resistance
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This week’s Metabolic Classroom lecture is a deep dive into the metabolic roots of migraines—a condition that affects millions but is rarely discussed through the lens of insulin resistance and energy dysregulation.
Dr. Bikman explains that migraines are more than just headaches; they’re complex neurological events often triggered by disruptions in how the brain accesses and uses energy. When the brain becomes insulin resistant, its ability to efficiently meta...
The Real Cause of Fat Gain: Genetics, Hormones, and Insulin
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In this Metabolic Classroom lecture, Dr. Bikman explains how rare genetic forms of obesity—known as monogenic obesity—reveal deep insights into how the body stores fat and why the “calories in, calories out” model falls short.
He introduces three genetic conditions—leptin deficiency, POMC deficiency, and MC4R mutations—that disrupt appetite control and fat storage, all while keeping calorie intake the same. These disorders highlight how hormonal imbalances, especially chronically...
Yerba Mate and Metabolism: What the Science Says
In this Metabolic Classroom, Ben explores the fascinating metabolic effects of yerba mate, a traditional South American tea that’s gaining attention in scientific circles. Yerba mate contains a synergistic mix of bioactive compounds, including xanthines (like caffeine), chlorogenic acid, and saponins—all of which contribute to its wide-ranging health benefits. Dr. Bikman explains how this unique brew supports fat loss, improves mitochondrial efficiency, regulates appetite, and enhances insulin sensitivity.
Drawing from human and rodent studies, the lecture highlights yerba mate’s ability to increase fat oxidation, particularly when combined with exercise. It also activates AMPK, a crit...
The Link Between Muscle Loss, Aging and Obesity: Anabolic Resistance Explained w/Dr. Ben Bikman
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In this Metabolic Classroom lecture, Ben explores the concept of anabolic resistance—the body’s reduced ability to build and maintain muscle in response to stimuli like protein intake and resistance training.
This phenomenon, often associated with aging, also affects individuals with obesity or a sedentary lifestyle. Because muscle health is directly tied to longevity, strength, insulin sensitivity, and independence, understanding and reversing anabolic resistance is critical for l...
The Sugar Diet: What the Science Really Says
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In this episode of the Metabolic Classroom, Dr. Ben Bikman explores a surprising and controversial dietary trend: the “sugar diet.”
Despite its name, this diet isn’t built around candy and soda. Instead, it promotes a very high intake of simple carbohydrates—primarily from natural sources like fruit, honey, and juices—while restricting both protein and fat to below 10% of total calories. This unusual approach has been gaining pop...
An Alternative View of T1DM
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In this lecture, Ben challenges the conventional insulin-centric model of type 1 diabetes by introducing the “bi-hormonal hypothesis” proposed by Dr. Roger Unger.
While insulin deficiency is a defining feature of T1DM, Dr. Bikman emphasizes the overlooked role of glucagon in driving hyperglycemia, ketone production, and muscle wasting. In normal physiology, insulin from beta cells locally suppresses glucagon from alpha cells. But in type 1 diabetes, this local regulation is...
Nitrates and Nitrites: Villain or Metabolic Hero?
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This Metabolic Classroom lecture explores the often misunderstood world of nitrates and nitrites—compounds historically feared due to their association with processed meats.
Dr. Bikman presents a balanced examination of their biological role, historical use, and potential risks and benefits. While concerns remain over their conversion into carcinogenic nitrosamines (mainly in animal studies), the real-world human data is inconsistent and largely correlational. In fact, vegetables are the largest...
Menopause, Ketones, and Metabolism: A Strategy Explained
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This Metabolic Classroom lecture with Dr. Bikman explores how the loss of estradiol during menopause affects five key metabolic systems: the brain, muscles, mitochondria, fat tissue, and inflammation.
Each of these systems relies on estradiol for optimal function, and its decline contributes to increased risk for cognitive impairment, muscle loss, reduced mitochondrial function, increased visceral fat, and systemic inflammation.
Ketones—particularly beta-hydroxybutyrate (BHB)—can provide a...
How the MTHFR Gene Affects Our Metabolic Health
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In this Metabolic Classroom lecture, Dr. Bikman explores the MTHFR gene and how common mutations can affect overall metabolic health. Ben explains the biochemical role of the MTHFR enzyme in the methylation cycle, its influence on homocysteine levels, and its downstream impact on DNA repair, neurotransmitter synthesis, and detoxification.
Ben also discusses how impaired MTHFR function contributes to oxidative stress and insulin resistance, particularly through its effect on...
Creatine Demystified: Brain, Muscle & Metabolic Benefits
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In this Metabolic Classroom lecture, Dr. Bikman breaks down the true nature and benefits of creatine—a molecule often misunderstood as merely a muscle-building supplement. Creatine plays a critical role in cellular energy production by helping regenerate ATP, especially in high-energy tissues like skeletal muscle and the brain. While our bodies produce creatine endogenously, supplementation can significantly enhance its availability and effects.
Ben discusses how creatine has been shown t...
Can Nattokinase Improve Heart & Metabolic Health?
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In this Metabolic Classroom lecture, Dr. Bikman dives into the science behind nattokinase, an enzyme derived from natto—a fermented soybean staple in Japan. Nattokinase has gained attention for its cardiovascular benefits, especially its ability to dissolve blood clots. Ben explains the enzyme’s key role in degrading fibrin, the primary structural protein in clots, and how it stimulates the body’s own clot-dissolving pathway by activating plasminogen. He compares its action to ph...
The China Study Revisited - Science vs. Storytelling
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In this episode of The Metabolic Classroom, Dr. Bikman critically examines the claims made in The China Study, a popular book advocating for a plant-based diet based on correlational data from the China-Cornell-Oxford Project. While the book suggests that animal protein causes cancer and chronic disease, Ben emphasizes that correlation is not causation and points out that many of the study’s conclusions are misleading or unsupported by the raw data.
Does the HCG Diet Actually Work? What the Studies Really Say
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During this Metabolic Classroom lecture, Dr. Bikman unpacks the history, claims, and science behind the controversial HCG diet.
Originally popularized in the 1950s by Dr. Albert Simeons, the diet pairs daily HCG hormone injections with an extremely low-calorie diet (around 500 calories/day). Simeons claimed that HCG helps target problem fat areas, preserve muscle, and suppress hunger. Ben explains HCG’s legitimate role in pregnancy and medical uses (e.g., infertility and hypogona...
How Lectins Disrupt Insulin, Gut Health, and Immunity
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In this lecture, Dr. Bikman introduces lectins as harmful plant-derived proteins often found in carbohydrate-rich foods like legumes, grains, and nightshades. While these molecules serve as plant defense mechanisms, in humans they can bind to gut lining cells, disrupting tight junctions and increasing gut permeability (leaky gut). This disruption allows bacterial fragments (e.g., LPS) to enter circulation, triggering systemic inflammation, which in turn increases insulin resistance, autoimmune reactivity, and cardiometabolic risk.
Lect...
How Lipoprotein Lipase (LPL) Determines Where Your Body Stores Fat
In this Metabolic Classroom lecture, Dr. Bikman dives into the central metabolic role of lipoprotein lipase (LPL)—a largely unsung but crucial enzyme that governs whether fat is burned or stored and even where it accumulates in the body.
LPL is anchored to capillary walls in tissues like fat, muscle, heart, and lactating mammary glands. It acts as a metabolic gatekeeper, hydrolyzing triglycerides from circulating lipoproteins (like chylomicrons and VLDL) into free fatty acids. Depending on the tissue, those fatty acids are either burned (e.g., in muscle) or stored (e.g., in fat cells). LPL ac...
