Dr. Peter Attia wants you to live as long as humanly possible. The Texas-based physician, who trained at Stanford, Johns Hopkins, and the National Institutes of Health, has built an empire on ...

Peter Attia, a longevity doctor and author of the bestseller "Outlive," takes at least nine supplements each morning, including a probiotic he stores in the fridge.

But Dr. Peter Attia, a physician and longevity influencer, doesn’t believe it has to be that way. Our later years, he argues, are something we can start training for now.

Attia believes that you can prevent decline through an aggressive combination of exercise, lifestyle, and elements from personalized health care, or what he calls Medicine 3.0.

Longevity expert Peter Attia speaking at The New York Times Well Festival. Getty Images for The New York Times He believes everyone has a “marginal decade,” meaning the last 10 years of your life.