What you do today shapes your strength, clarity, and resilience for years to come. Get Dr. Peter Attia's 8-lesson Introductory Guide to Longevity — 100% free, straight to your inbox. | Peter Attia, MD

Longevity star Dr. Peter Attia tells his patients to eat one gram of protein for every pound they weigh, every day – that’s more than double what the current nutritional guidelines recommend. The doctor and a handful of his patients have also used a drug called rapamycin, usually prescribed to transplant recipients, that has extended lifespan in mice. He stopped for now, because it gave him mouth sores, which can be a side effect. | 60 Minutes