How to Unlock Autophagy After 60: The Science of Caloric Restriction and Intermittent Fasting

Autophagy is your cells' internal cleaning crew — and it may be the most powerful anti-aging mechanism your body already has. The problem? Most people over 60 have it running at a fraction of its potential. This is Episode 3 of our "How to De-Age Just by Switching Up Your Diet" series. Dr. Thomas breaks down the science of caloric restriction and intermittent fasting as autophagy triggers, reviews the CALERIE trial's landmark findings, and is honest about the real risks and limitations. What you'll learn: ✅ What autophagy is and why it's your body's most important cellular repair system ✅ Caloric restriction vs intermittent fasting: two very different paths to the same biological destination ✅ The biological chain reaction: how low energy activates AMPK → sirtuins → autophagy ✅ The CALERIE trial: after 2 years of caloric restriction, participants literally slowed their biological pace of aging ✅ The animal evidence: consistent lifespan extension from yeast and worms all the way to rhesus monkeys ✅ The real benefits: weight loss, reduced inflammation, better cholesterol, improved insulin sensitivity ✅ The honest risks: feeling cold, bone thinning in women, menstrual irregularities, and difficulty maintaining long-term ✅ Why you should never attempt serious caloric restriction without medical supervision The science of scarcity suggests the future of longevity may lie not just in what we eat — but in when we strategically don't. 📌 New videos every week on senior health, longevity science, and anti-aging nutrition. ⚠️ Disclaimer: This content is for educational purposes only. Never attempt caloric restriction without consulting your doctor or registered dietitian. Timestamps / Chapters: 00:00 - The Secret to Extending Your Lifespan 00:34 - The Challenge: Protecting Our Brains as We Age 01:25 - Ancient Practices: Two Diets with One Goal 01:45 - What is Caloric Restriction (CR)? 02:08 - Understanding Intermittent Fasting (IF) 02:29 - The Core Difference: "How Much" vs. "When" 02:53 - A Century of Longevity Research (From Rats to Humans) 03:17 - Survival Circuits: The Science of Scarcity 03:53 - How AMPK, mTOR, and Sirtuins Control Aging 04:21 - Autophagy & Cellular Cleanup Explained 04:50 - Do Animal Studies Translate to Human Life? 05:35 - The CALERIE Trial: Slowing Down the Biological Clock 05:55 - Potential Health Benefits for Humans 06:19 - Important Risks & Caveats to Consider 06:50 - Conclusion: A New Pace for Aging how to unlock autophagy for longevity what is autophagy and how does it work how to activate ampk naturally ampk vs mtor pathway explained how does caloric restriction slow aging intermittent fasting vs caloric restriction what is the calorie trial human study how to slow down biological clock naturally dr thomas golden years pulse autophagy how to activate sirtuins with fasting does fasting trigger cellular repair what happens during autophagy in the body how to increase healthspan with diet is caloric restriction safe for humans benefits of fasting for brain health how to protect the brain from alzheimers naturally how to reset hormones with intermittent fasting does eating less make you live longer what are the longevity proteins sirtuins how cells repair themselves during fasting how to stop inflammaging with diet intermittent fasting for metabolic health how to improve insulin sensitivity quickly does fasting burn stored fat for fuel how to turn on the protect and repair switch in cells ancient survival circuits in the body what is the metabolic switch for longevity can you reverse aging by eating less how to lower inflammation with intermittent fasting what are the risks of caloric restriction does fasting cause bone thinning in women how to boost resilience to stress naturally how to clear damaged cells from the body the science of scarcity and longevity how to add more life to your years dr thomas how to de age with diet how to stop mtor pathway for longevity does caloric restriction cause malnutrition what is the most proven way to extend lifespan how to change the fundamental pace of aging how to do intermittent fasting for cellular cleanup what foods break autophagy does intermittent fasting slow biological age how to prevent neurodegenerative diseases naturally how to slow brain aging with fasting best diet for cellular health and repair how to activate the master longevity switch why our bodies need periods of not eating how to delay aging and age related diseases how to safely practice calorie restriction for longevity