The Metabolic Classroom

Topic: Peripheral neuropathy is not caused by high glucose alone, but by the combined effects of hyperglycemia, insulin resistance, and glycemic variability. Protecting nerves requires improving insulin sensitivity and reducing glucose swings—not just lowering A1C.Summary: Ben explains why peripheral neuropathy is not simply a “high blood sugar” problem. While hyperglycemia clearly damages nerves, the story is more complex—especially in type 2 diabetes, where intensive glucose control does not prevent neuropathy nearly as well as it does in type 1 diabetes. Dr. Bikman argues that neuropathy is driven by three interacting metabolic forces: chronic hyperglycemia, insulin resistance, and glycemic variability.He begins by defining peripheral neuropathy as damage to the nerves outside the brain and spinal cord, most commonly appearing first in the feet and toes because the longest nerves are often affected earliest. He then explains how excess glucose damages nerves through the sorbitol pathway, oxidative stress, glycation, and inflammation. But glucose is only one part of the problem.The second pillar is insulin resistance. Peripheral nerves and their support cells, especially Schwann cells, need insulin signaling to maintain healthy myelin and nerve repair. When insulin signaling fails, nerves lose an important trophic support system even before glucose becomes severely elevated. The third pillar is glycemic variability, or repeated glucose swings, which may damage nerves beyond what A1C alone can reveal.The key takeaway is that protecting nerves requires more than lowering average blood sugar. It requires improving insulin sensitivity, reducing glucose swings, stabilizing post-meal responses, and addressing the metabolic dysfunction that damages nerves from multiple directions.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 Ben's Weekly Research Review Podcast. Learn more: https://www.benbikman.comNOTE: The information presented is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Dr. Bikman is not a clinician—and, he is not your doctor. Always seek the advice of your own qualified health providers with questions you may have regarding medical conditions. Hosted on Acast. See acast.com/privacy for more information.

Listen ad-free by becoming an Insider: https://benbikman.comAsk Dr. Bikman's Digital Mind (multilingual): https://benbikman.com/ben-bikmans-digital-ai-mindDr. Bikman's Community & Coaching Site, Insulin IQ: https://insuliniq.comNicotine 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 harmful compounds in cigarettes.Contrary to popular belief, nicotine alone is not highly addictive; tobacco additives like pyrazines likely amplify the addiction seen in cigarettes. Dr. Bikman details nicotine's anti-inflammatory properties, particularly through activation of the alpha-7 nicotinic acetylcholine receptor, which may help conditions like ulcerative colitis, sepsis, and arthritis.Ben also explores its complex effects on metabolism—such as increased thermogenesis and fat oxidation—while warning of potential insulin resistance with sustained use.Lastly, he reviews fascinating clinical research suggesting therapeutic potential in conditions like ADHD, autism, Tourette's syndrome, and even Alzheimer's, all while emphasizing that nicotine, when separated from cigarette smoke, warrants more open scientific inquiry.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. Learn more: https://www.benbikman.comNOTE: The information presented is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Dr. Bikman is not a clinician—and, he is not your doctor. Always seek the advice of your own qualified health providers with questions you may have regarding medical conditions. Hosted on Acast. See acast.com/privacy for more information.

Listen ad-free by becoming an Insider: https://www.benbikman.comReferences: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.

Listen Ad-Free: https://benbikman.comIn 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 resistance the heart must pump against, effectively easing the heart's workload. He also details ketones' role in promoting vasodilation by acting on endothelial cells and smooth muscle, increasing nitric oxide and improving overall circulation.Beyond fuel metabolism, BHB also acts as a signaling molecule with epigenetic and anti-inflammatory effects. It can modulate gene expression by influencing histone acetylation and β-hydroxybutyrylation, leading to improved antioxidant defense and reduced inflammation via inhibition of the NLRP3 inflammasome—a key player in heart failure and atherosclerosis.Finally, he touches on the practical implications, suggesting both ketogenic diets and exogenous ketone supplements—particularly L-BHB—as viable strategies for enhancing cardiovascular resilience. This lecture positions ketones not just as fuel, but as potent metabolic signals capable of supporting and even restoring heart health.Show Notes/References:For complete show notes and references, we invite you to become an Insider subscriber or member. 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. Learn more: https://www.benbikman.comIMPORTANT NOTE: The information presented is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Dr. Bikman is not a clinician—and, he is not your doctor. Always seek the advice of your own qualified health providers with questions you may have regarding medical conditions. Hosted on Acast. See acast.com/privacy for more information.

Listen Ad-Free: https://benbikman.comIn 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 effective plant proteins are at raising amino acid levels in the blood compared to animal proteins like pork or eggs.Importantly, the lecture addresses “antinutrients” in plant proteins—like trypsin inhibitors, phytates, and lectins—which impair protein digestion and mineral absorption. These antinutrients are also implicated in autoimmune responses, especially when intestinal permeability is compromised. Dr. Bikman explains how fermentation, soaking, and pressure cooking can help—but not eliminate—these compounds.The lecture concludes by warning about heavy metal contamination in plant-based protein powders and reminds us that while plant proteins can support health, they require more planning and carry additional nutritional burdens compared to their animal-based counterparts.Show Notes/References: For complete show notes and references, we invite you to become an Insider subscriber or member. 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, and a searchable archive. Learn more: https://www.benbikman.comIMPORTANT NOTE: The information presented is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Dr. Bikman is not a clinician—and, he is not your doctor. Always seek the advice of your own qualified health providers with questions you may have regarding medical conditions. Hosted on Acast. See acast.com/privacy for more information.

visit: https://www.benbikman.comvisit: https://insuliniq.com 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 fasting, exercise, or low-carb eating.Ben walks through how ketogenesis begins at the level of fat cells and liver mitochondria, and how key molecules like acetyl-CoA and oxaloacetate determine whether the body makes glucose or ketones.Importantly, he clarifies that while stress can trigger positive metabolic shifts, chronic stress without relief can lead to harmful insulin resistance. The takeaway: understanding the difference between acute and chronic stress is key to using this response to your metabolic advantage. Hosted on Acast. See acast.com/privacy for more information.

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 critical energy-regulating enzyme, which promotes glucose uptake and mitochondrial biogenesis. One of the most intriguing effects of yerba mate is its stimulation of GLP-1—both directly through the gut and indirectly by modifying the gut microbiome—making it a natural, non-pharmaceutical way to enhance satiety and insulin regulation.Dr. Bikman also discusses the underappreciated role of bitter taste receptors in the body—not just on the tongue, but also in fat cells and the gut. Yerba mate interacts with these receptors to influence hormone release (like CCK and PYY) and to promote thermogenesis in brown and beige fat, offering yet another pathway for metabolic support. Finally, he shares unpublished findings from his lab showing yerba mate's impact on hepatic redox balance, adding to its reputation as a powerful metabolic ally.Ben's favorite yerba mate and fiber supplement: https://ufeelgreat.com/usa/en/c/1BA884 Hosted on Acast. See acast.com/privacy for more information.

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 activity is influenced by hormones, diet, age, exercise, and weight status, and it plays a role in both fat distribution and metabolic disease.LPL expression is highly tissue-specific and hormonally regulated. For instance, insulin increases LPL in fat tissue (promoting fat storage) and suppresses it in muscle (reducing fat burning), whereas testosterone suppresses LPL in subcutaneous fat, especially in the buttocks and hips—explaining fat patterning differences between sexes. In contrast, estrogen increases LPL in subcutaneous areas, which supports healthier fat distribution in women. Interestingly, low-carb diets and exercise reverse this pattern, increasing muscle LPL and decreasing fat LPL, thus shifting the body into a fat-burning mode.Ben also explains how weight loss impacts LPL expression. During weight loss, LPL activity in fat tissue tends to decline, but LPL gene expression can paradoxically increase, setting the stage for weight regain. He cites long-term studies showing that individuals with higher adipose LPL activity after dieting are more likely to regain fat. LPL in muscle tissue, however, increases after weight loss and exercise, supporting greater fatty acid oxidation. Thyroid hormone also influences LPL in both fat and muscle, revving up metabolism in hyperthyroid states and lowering LPL activity in hypothyroidism.Finally, Ben links LPL to real-world clinical questions, including its role in insulin resistance, statin effects, thyroid hormone therapy, and sex hormone treatments like TRT. He emphasizes that LPL doesn't just respond to metabolism—it helps define it, and that insulin is the dominant regulator of this enzyme.Show Notes/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 after the lecture with Ben, ad-free podcast episodes, show notes and references, online Office Hours access, Ben's Research Reviews Podcast, and a searchable archive that includes all Metabolic Classroom episodes and Research Reviews.

Dr. Ben Bikman opens this lecture with a comprehensive overview of fluoride's history in public health, highlighting its original role in preventing dental cavities. However, he shifts the focus to its lesser-known systemic effects, particularly on metabolic health.Ben emphasizes emerging evidence that chronic exposure to fluoride—from water, toothpaste, and other products—can disrupt fat cell function and insulin sensitivity, both key pillars of metabolic regulation.Dr. Bikman explains how fluoride interferes with fat cell development by inhibiting PPARγ, a key regulator of adipogenesis. While this may initially seem beneficial (fewer fat cells), it actually leads to hypertrophic fat cells that are more insulin resistant and pro-inflammatory. Though human data is limited, epidemiological studies suggest a link between high fluoride exposure and abdominal obesity.Fluoride's impact extends to insulin resistance and pancreatic function. Rodent studies show impaired glucose tolerance and reduced insulin production following fluoride exposure. Mechanistically, this is due to oxidative stress damaging mitochondria in beta cells, impairing both insulin release and glucose uptake. Human studies—though sparse—have shown similar trends in high-fluoride areas with improvements upon fluoride reduction.Ben also explores fluoride's effects on mitochondrial function, liver health, brain development, and fertility. Mitochondrial damage in fat and liver cells impairs energy production and fat metabolism, potentially leading to fatty liver disease. In the brain, fluoride may lower IQ and disrupt thyroid function—especially harmful during development. In fertility, fluoride is linked to lower sperm count and hormone disruption in animal models. Dr. Bikman concludes by recommending avoiding fluoride in drinking water while acknowledging its limited role in dental care.Show Notes/References:For complete show notes and references, we invite you to become a Ben Bikman Insider subscriber. As a subscriber, you'll enjoy real-time, livestream Metabolic Classroom access which includes live Q&A after the lecture with Ben, ad-free podcast episodes, show notes and references, online Office Hours access, Ben's Research Reviews Podcast, and a searchable archive that includes all Metabolic Classroom episodes and Research Reviews. Learn more: https://www.benbikman.com Hosted on Acast. See acast.com/privacy for more information.