98: Cortisol & Insulin Resistance: How Cortisol Drives Fat Gain & Carb Cravings with Dr. Ben Bikman

Video Description

📢 Ask Dr. Bikman’s Digital Mind: https://benbikman.com/ben-bikmans-digital-ai-mind This week, Dr. Bikman dives deep into the metabolic role of cortisol, the body’s primary glucocorticoid. He explains that while cortisol is essential for survival—mobilizing energy during fasting or stress—chronically elevated levels can wreak metabolic havoc. Cortisol is produced by the adrenal cortex under direction from the hypothalamic-pituitary-adrenal (HPA) axis. Its main role is to ensure energy availability, stimulating glycogen breakdown, muscle catabolism, and fat breakdown in specific depots. However, long-term cortisol elevation, such as in Cushing’s disease, leads to fat redistribution, muscle loss, insulin resistance, and increased risk of type 2 diabetes. Cortisol’s metabolic effects are driven by its action on glucocorticoid receptors inside cells, activating genes like PEPCK and glucose-6-phosphatase that stimulate gluconeogenesis and increase blood sugar. It also indirectly causes insulin resistance by increasing ceramide accumulation, which interferes with insulin signaling in cells like muscle and fat. This, combined with glucose overproduction and muscle loss (the major glucose sink), creates a perfect metabolic storm: high blood sugar, high insulin, and reduced glucose uptake. The hormone also affects fat storage patterns. Cortisol enhances fat accumulation in visceral (abdominal) fat while stimulating fat loss in subcutaneous regions like the limbs. It increases fat uptake by upregulating lipoprotein lipase and blocks fat breakdown by suppressing hormone-sensitive lipase, especially in the abdominal region. Yet cortisol alone isn’t enough to cause fat gain—insulin is still required. Lastly, cortisol influences the brain’s hunger and reward systems, increasing carbohydrate cravings through neuropeptide Y and dopamine signaling. Chronic stress or medical conditions that elevate cortisol can drive overeating and central obesity. In short, while cortisol is necessary, its chronic elevation leads to insulin resistance, fat redistribution, and loss of metabolic control. 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, Ben’s Research Reviews Podcast, and a searchable archive that includes all Metabolic Classroom episodes and Research Reviews. Learn more: https://www.benbikman.com Translation Notes: You can click the gear icon at the bottom of this video to auto-translate captions. For example, to translate into Polish, select Subtitles, choose Auto-Translate, then first choose English, then choose Auto-Translate again, then choose Polish.) In addition, our channel has first access to YouTube’s new, innovative “auto-dubbing” feature. The process currently supports translations from English into French, German, Hindi, Indonesian, Italian, Japanese, Portuguese, and Spanish. Click on the gear icon, then choose “Audio track” to access. #Cortisol #InsulinResistance #ChronicStress #GlucoseControl #MetabolicHealth #CushingsDisease #HormonalBalance #FatStorage #Ceramides #DrBenBikman #VisceralFat #FatLoss #SubcutaneousFat #BloodSugar #AppetiteRegulation #Type2Diabetes #Mitochondria #HPAaxis #CortisolAndCravings #FatDistribution Timestamps (approximate): 01:16 – Cortisol as a Glucocorticoid: Basics & Function 02:32 – The HPA Axis and Cortisol Regulation 03:57 – How Cortisol Mobilizes Energy (Glucose, Fat, Protein) 05:21 – Cortisol’s Gene-Level Impact on Glucose Production 06:31 – Diurnal Rhythm of Cortisol 07:31 – Cushing’s Disease: Classic Cortisol Dysregulation 09:36 – Cortisol and Type 2 Diabetes Risk 13:06 – How Cortisol Increases Ceramides and Blocks Insulin 16:41 – Cortisol’s Dual Role in Fat Gain and Fat Loss 21:43 – Cortisol vs. Insulin in Fat Storage 24:12 – Untreated Type 1 Diabetes: The Power of Insulin 25:24 – How Cortisol Affects Appetite and Cravings 📢 Learn more about becoming an Insider on Ben’s website: https://www.benbikman.com Ben’s favorite yerba maté and fiber supplement: https://ufeelgreat.com/usa/en/c/1BA884 Ben’s favorite meal-replacement shake: https://gethlth.com (discount: BEN10) Ben’s favorite electrolytes (and more): https://redmond.life (discount: BEN15) Ben’s favorite allulose source: https://rxsugar.com (discount: BEN20) Ben’s favorite health check-up for women: https://choosejoi.co/drben15 (discount: DRBEN15) Ben’s favorite health check-up for men: https://blokes.co/drben15 (discount: DRBEN15) Ben’s favorite exogenous ketone: https://www.americanketone.com (discount: BEN10) Ben’s favorite dress shirts and pants: https://toughapparel.com/?ref=40 (use BEN10 for 10% off) Other products Ben likes: https://www.amazon.com/shop/benbikmanphd