The Human Upgrade: Biohacking for Longevity & Performance Why Your Muscles Break Down After 40 (Do This To Reverse It) : 1412
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Feb 8, 2026 They dig into why muscle decline accelerates after midlife and how cellular energy loss drives fatigue and weakness. The conversation covers mitophagy, the cellular cleanup process that falters with age. They highlight urolithin A as a compound that can trigger mitophagy and discuss a bioavailable supplement version. Finally, they stress combining supplementation with resistance training, protein, and sleep.
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Mitochondria Drive Energy Decline
- Mitochondria are cellular power plants that decline with age, causing fatigue and weakness.
- Replacing damaged mitochondria is essential to restore energy and muscle function.
Mitophagy Is The Cellular Cleanup
- Mitophagy is the body's process for clearing damaged mitochondria and enabling renewal.
- This cleanup slows with age, so damaged mitochondria accumulate and reduce cellular energy.
Urolithin A Reboots Cellular Cleanup
- Urolithin A activates mitophagy and re-energizes cells by prompting mitochondrial renewal.
- Only ~30–40% of people naturally produce it, and most produce insufficient amounts.