At the heart of Healthy Aging is Dr. Weilś belief that although aging is an irreversible process, there are myriad things we can do to keep our minds and bodies in good working order through all phases of life. To that end, he draws on the new science of biogerentology (the biology of aging) as well as on the secrets of healthy longevity--diet, activity, and attitude--that he has gathered first hand from cultures around the world.