@lifespan.expert: Most people think of fasting as a way to lose weight. David Sinclair says there may be much more happening beneath the surface. While intermittent fasting (14–16 hours) can help improve metabolic health, Sinclair occasionally practices **longer fasts** because they may activate additional cellular processes. After about 2–3 days without food, your body shifts more deeply into ketosis, producing ketones as an alternative fuel source. More importantly, prolonged fasting may stimulate **chaperone-mediated autophagy**—a specialized form of cellular recycling. Autophagy literally means "self-eating." It's the process by which cells break down and recycle damaged proteins and worn-out cellular components, helping maintain cellular function. Researchers are actively studying how fasting-induced autophagy may influence: 🧬 Cellular health 🧠 Brain function 🔥 Metabolic health ⏳ Healthy aging That said, extended fasting isn't necessary—or appropriate—for everyone. It carries risks and should be approached carefully, particularly for people with diabetes, those taking certain medications, pregnant women, or anyone with a history of eating disorders. The bigger takeaway: Your body has remarkable built-in repair systems. Understanding when and how they're activated is one of the most exciting areas of longevity research today. The goal isn't simply to eat less. It's to give your cells the opportunity to repair, recycle, and function at their best. — Fair use disclaimer: This content is used for educational and informational purposes under fair use. All rights belong to their respective owners. Medical disclaimer: This content is for informational purposes only and is not medical advice. Extended fasting is not appropriate for everyone and should only be undertaken under the guidance of a qualified healthcare professional. More research is needed to fully understand its long-term effects and optimal protocols.

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Monday 13 July 2026 05:56:00 GMT