Well, as the article points out, and other articles have pointed out, Metformin has a modestly positive effect on longevity. The diseases associated with diabet

Well, as the article points out, and other articles have pointed out, Metformin has a modestly positive effect on longevity. The diseases associated with diabetes type II (metabolic syndrome, syndrome X) pretty much overlap with the main diseases that kill old people. It would thus make sense that a drug designed to alleviate symptoms of diabetes could modestly slow down aging.