Not many compounds actually extend life in healthy animals, but rapamycin is indeed one of them. These researchers report that its mechanism of action, the mechanistic target of rapamycin (mTOR), is linked to five of twelve hallmarks of aging [1]. They give a very long list of the conditions that mTOR affects, including osteoporosis [2], brain degeneration [3], cardiovascular disorders [4], and even cancer [5], a condition for which rapamycin and rapalogs can be prescribed.