Fructose Metabolism in Obesity, Dementia, Evolution | Richard Johnson | Episode 295

Send us Fan MailFructose survival hypothesis: how fructose metabolism in the liver triggers ATP depletion, uric acid production, oxidative stress, lipogenesis & leptin resistance.TOPICS DISCUSSED:Glucose vs Fructose Metabolism: Fructose is rapidly metabolized in the liver by fructokinase without feedback, causing ATP depletion and uric acid production, unlike glucose metabolism.Liver Effects: Fructose induces uric acid production, NADPH oxidase activation, mitochondrial oxidative stress, and de novo lipogenesis even under caloric restriction.Fructose Survival Hypothesis: Fructose signaling promotes fat storage, leptin resistance, foraging behavior, and metabolic syndrome as adaptations for hibernation or starvation, including metabolic water production.Brain Impacts: Endogenous fructose production from glucose (polyol pathway) triggered by high glucose, salt, or stress leads to insulin resistance, mitochondrial damage, and neuroinflammation in Alzheimer’s-vulnerable regions.Evolutionary Context: Human uricase mutation ~12 million years ago enhanced fructose effects for fat storage during seasonal starvation but increases vulnerability today.Modern Triggers: Added sugars, high fructose corn syrup, salt-sugar combinations, and omega-6 fats synergize with fructose to amplify inflammation, appetite, and disease risk.Alzheimer’s Link: Fructose-driven brain changes mirror Alzheimer’s pathology, with high brain fructose in patients and potential for fructokinase inhibitors as therapy.ABOUT THE GUEST: Richard Johnson MD, is a professor of medicine who has conducted clinical practice and NIH-funded research on sugar metabolism since the late 1990s. His work focuses on the role of fructose in metabolic syndrome, obesity, and related diseases.RELATED CONTENT:Article | Dietary Fructose & Metabolic Health: An Evolutionary PerspectiveM&M 249: Fructose, Microglia, Anxiety & Brain Development | Justin Perry | 249Support the showHealth Products by M&M Partners:AquaTru: Water filtration devices that remove microplastics, metals, bacteria, and more from your drinking water. Through link, $100 off AquaTru Carafe, Classic & Under Sink Units; $300 off Freestanding models.OmegaQuant: At-home blood testing to see fatty acid profiles, including omega-3 fatty acids. Use link to see options and support M&M.SiPhox Health: Comprehensive, cost-effective bloodwork from the comfort of home. Use code TRIKOMES for 20% off.KetoCitra—Ketone body BHB + electrolytes formulated for kidney health. Use code MIND20 for 20% off any subscription (cancel anytime)SporesMD: Premium mushrooms products (gourmet mushrooms, nootropics, research). Use code 'nickjikomes' for 20% off.For all the ways you can support my efforts