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97: “Fast” vs. “Slow” Insulin Resistance: The Two Paths Explained with Dr. Ben Bikman

In this lecture, Dr. Bikman presents a framework for understanding the two primary patterns of insulin resistance onset—what he terms “fast” and “slow” insulin resistance. “Fast” insulin resistance happens quickly and can often be reversed just as rapidly. It’s typically triggered by three major factors: elevated insulin (from frequent carb consumption), stress hormones like cortisol and epinephrine, and inflammation (from infection, injury, or autoimmune activity). These triggers lead to the cellular accumulation of ceramides, which interfere with insulin signaling at the molecular level. The good news, he emphasizes, is that when these triggers are removed, the insulin resistance can often resolve quickly. “Slow” insulin resistance, on the other hand, develops gradually and is more difficult to reverse. It begins in the fat cell, where prolonged exposure to insulin and excess calories causes hypertrophy—the fat cells get larger. As they grow, they become insulin resistant as a form of self-preservation, but this leads to a damaging cascade: elevated free fatty acids, chronic low-grade inflammation, and disruption of glucose control. Dr. Bikman describes how hypertrophic fat cells become hypoxic, triggering inflammation and impairing surrounding tissues. Unlike the fast form, slow insulin resistance is rooted in long-term lifestyle habits and takes time to correct. The standard advice to “just cut calories” fails to address the core issue—chronically high insulin. Instead, Ben recommends that people first focus on lowering insulin through carbohydrate restriction, which naturally curbs hunger, boosts energy expenditure, and allows fat cells to shrink in a sustainable way. He concludes that understanding whether your insulin resistance is fast or slow in origin can help shape more effective interventions. With better insight into the mechanisms—from ceramides to fat cell hypertrophy—comes better, more targeted strategies to improve metabolic health. 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 is now among a select group with early, first access to YouTube’s new, innovative “auto-dubbing” feature. The auto-dubbing process currently supports translations from English into French, German, Hindi, Indonesian, Italian, Japanese, Portuguese, and Spanish, but will continue to be expanded to other languages. Click on the gear icon, then choose “Audio track” to listen in another language. #InsulinResistance #FastInsulinResistance #SlowInsulinResistance #Ceramides #MetabolicHealth #FatCellHypertrophy #LowCarbDiet #Inflammation #StressAndCortisol #GlucoseControl #DrBenBikman #KetoScience #ChronicDisease #FatBurning #HormonalBalance #DiabetesPrevention #MetabolicFlexibility #HealthEducation Timestamps (approximate): 01:04 – Two Types of Onset: Rapid vs. Gradual 02:13 – Fast IR: What Triggers It? 03:25 – Too Much Insulin: Hyperinsulinemia and Cellular Response 05:43 – How Carbs Spike Insulin and Drive Resistance 06:43 – Why 70% of Global Calories from Carbs Matters 09:54 – Stress Hormones: Cortisol, Epinephrine, and Insulin 12:11 – Cushing’s Syndrome and Hormonal IR 13:29 – Inflammation and Cytokines in IR 15:35 – Ceramides: The Common Thread in Fast IR 17:53 – Slow IR: Origin in the Fat Cell 20:05 – Fat Cell Growth: Insulin Signal + Calories 26:28 – Subclinical Systemic Inflammation 27:42 – Why Reducing Insulin Comes Before Cutting Calories 28:44 – Final Summary: Fast and Slow IR Compared 📢 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