We'd die quite quickly without amino acids, the organic compounds that serve as the building blocks for every protein in the human body. Without them… - David A. Sinclair

I believe that aging is a disease. I believe it is treatable. I believe we can treat it within our lifetimes. And in doing so, I believe, everything we know about human health will be fundamentally changed.

I eat a lot of plants and try to avoid eating other mammals, even though they do taste good. If I work out, I will eat meat. • I don't smoke. I try to avoid microwaved plastic, excessive UV exposure, X-rays, and CT scans. • I try to stay on the cool side during the day and when I sleep at night. • I aim to keep my body weight or BMI in the optimal range for healthspan, which for me is 23 to 25.

The other test of age is the sitting-rising test (SRT). Sit on the floor, barefooted, with legs crossed. Lean forward quickly and see if you can get up in one move. A young person can. A middle-aged person typically needs to push off with one of their hands. An elderly person often needs to get onto one knee. A study of people 51 to 80 years found that 157 out of 159 people who passed away in 75 months had received less than perfect SRT scores.