Health Longevity Secrets Is Rapamycin the Best Longevity Drug? with Dr Rick Cohen
Aug 12, 2025
Dr Rick Cohen, longevity physician with 25+ years focused on metabolic health and rapamycin. He tells rapamycin’s origin story and explains mTOR as the growth-versus-repair switch. He discusses cycling and pulsed dosing, how to avoid immune suppression, markers to monitor, and combining rapamycin with diet, fasting, strength training and iron management for personalized metabolic health.
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Easter Island Freezer Sparked Rapamycin Discovery
- Rapamycin was discovered from soil on Easter Island and sat forgotten in a scientist's freezer for a decade before its broader properties were recognized.
- That sample revealed antifungal activity, immune effects, and led to naming the mTOR pathway after the molecule rapamycin.
mTOR Is The Growth Versus Repair Switch
- mTOR is an evolutionarily conserved metabolic switch that tells cells to grow when nutrients are abundant and to repair when nutrients are scarce.
- AMPK opposes mTOR, activating during calorie scarcity to trigger autophagy and cellular cleanup.
Target mTOR1 Not mTOR2 For Longevity Benefits
- Rapamycin primarily targets mTOR1 to shift cells toward repair, but higher or poorly timed dosing can affect mTOR2 and cause immune suppression.
- The therapeutic goal in longevity is metabolic health improvement rather than blanket suppression.