Rapamycin: The Longevity Drug — Matt Kaeberlein Explains

Rapamycin is the most promising longevity drug ever discovered — found in Easter Island soil, it extends lifespan in every species tested. Aging researcher Matt Kaeberlein explains why it works and whether you should take it. In this episode of Health Longevity Secrets, Robert Lufkin MD sits down with Dr. Matt Kaeberlein, former professor at the University of Washington School of Medicine and co-founder of Ora Biomedical, to explore rapamycin's mechanism of action, the mTOR pathway, real-world dosing protocols, the Dog Aging Project, and why this compound may be the closest thing we have to an anti-aging pill. CHAPTERS: 00:00 — Introduction 04:06 — Dr. Matt Kaeberlein's Path to Aging Research 06:07 — What Is Biological Aging vs. Chronological Aging? 08:08 — Foundational Mechanisms of Aging: What We Know 10:09 — Lifestyle Interventions: Diet, Exercise, and Caloric Restriction 12:10 — What Is Rapamycin and Where Did It Come From? 14:10 — How mTOR Controls Growth, Reproduction, and Aging 17:10 — How Rapamycin Extends Lifespan in Every Species Tested 19:11 — Does Rapamycin Mimic Caloric Restriction? 21:12 — Rapamycin Reverses Age-Related Immune Decline 23:13 — Why Wasn't Rapamycin Discovered as a Longevity Drug Sooner? 25:14 — The Easter Island Connection: From Antifungal to Longevity 27:15 — mTOR vs. Non-mTOR Effects of Rapamycin 29:16 — Intermittent Fasting and mTOR Inhibition 31:19 — Rapamycin Dosing for Longevity vs. Immunosuppression 33:20 — Side Effects at Low Doses: What the Data Actually Shows 35:21 — Mouth Sores as a Biomarker: Good Sign or Bad Sign? 37:22 — Rapamycin, Autophagy, and Cellular Stress Resistance 39:24 — Hormesis and the Dose-Response Curve of mTOR Inhibition 41:26 — mTOR, Chronic Inflammation, and Age-Related Disease 43:26 — Rapamycin and Brain Health: Alzheimer's and Depression 45:26 — Ketogenic Diet, mTOR, and Mental Health 47:29 — The Dog Aging Project: Rapamycin in Companion Dogs 49:30 — Feeding Frequency and Canine Longevity 51:32 — What We've Learned So Far From Dog Aging Studies 53:36 — Where to Learn More and Final Takeaways KEY TAKEAWAYS: • Rapamycin is the most robustly validated longevity compound — it extends lifespan in yeast, worms, flies, and mice, and reverses age-related immune dysfunction • mTOR is a master nutrient sensor that drives growth and reproduction; inhibiting it with rapamycin shifts the body toward maintenance and repair • Low-dose intermittent rapamycin (weekly dosing) appears to have anti-inflammatory and immune-boosting effects without immunosuppressive side effects • Mouth sores from rapamycin may actually be a positive biomarker indicating the drug is reaching therapeutic levels • The Dog Aging Project is the largest-ever study of aging interventions in a natural model — companion dogs that share our environment • Less frequent feeding (once daily vs. multiple times) correlates with better health outcomes in dogs • Rapamycin may have significant neuroprotective effects through mTOR's role in brain inflammation and autophagy • Combining ketamine and rapamycin is being explored for chronic pain and depression STUDIES & SOURCES MENTIONED: • NIA Interventions Testing Program (ITP) rapamycin lifespan studies • Dr. Kaeberlein's research on rapamycin and immune function reversal • Dog Aging Project (dogagingproject.org) • Ora Biomedical (orabiomedical.com) • Chris Palmer's work on ketogenic diets and psychiatric disorders • Lenny Guarente's foundational aging biology research at MIT https://dogagingproject.org/ https://orabiomedical.com/ Please support this podcast by checking out our sponsors: Siphox Health, at-home health testing (15% off): https://pathlongevity.com/ ProLon Fasting Mimicking Diet (20% off): https://prolonlife.com/Lufkin ───────────────────────────────── 🔔 Subscribe for more evidence-based health insights 📖 Dr. Lufkin's book "Lies I Taught in Medical School": https://amzn.to/3Yvwaf9 📰 Substack newsletter: https://robertlufkinmd.substack.com 🌐 Website: https://robertlufkinmd.com 🧬 Vitals Vault: https://vitalsvault.com #rapamycin #longevity #mTOR #antiaging #dogagingproject #robertlufkinmd