Today, many of my colleagues are just as optimistic as I am, even if they don’t admit it publicly. I’d wager that about a third of them take metformin or an NAD booster. A few of them even take low doses of rapamycin intermittently. International conferences specifically about longevity interventions are now held every few weeks, the participants not charlatans but renowned scientists from the world’s most prestigious universities and research centers. In these gatherings it is no longer unusual to hear chatter about how raising the average human lifespan by a decade, if not more, will change
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