I used to prioritize nutrition over everything else, but I now consider exercise to be the most potent longevity “drug” in our arsenal, in terms of lifespan and healthspan.

Medicine 2.0 relies on two types of tactics, broadly speaking: procedures (e.g., surgery) and medications. Our tactics in Medicine 3.0 fall into five broad domains: exercise, nutrition, sleep, emotional health, and exogenous molecules, meaning drugs, hormones, or supplements.