Lifespan: Why We Age—and Why We Don't Have To

by David A. Sinclair

I strive to keep my sugar, bread, and pasta intake as low as possible. I gave up desserts at age 40, though I do steal tastes. • I try to skip one meal a day or at least make it really small. My busy schedule almost always means that I miss lunch most days of the week. • Every few months, a phlebotomist comes to my home to draw my blood, which I have analyzed for dozens of biomarkers. When my levels of various markers are not optimal, I moderate them with food or exercise. • I try to take a lot of steps each day and walk upstairs, and I go to the gym most weekends with my son, Ben; we lift weights, jog a bit, and hang out in the sauna before dunking in an ice-cold pool. • 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.