THIS IS INTERESTING, AND SOME OF MY TRANSHUMANIST FRIENDS ARE ALREADY TAKING IT: Forget the Blood of Teens. This Pill Promises to Extend Life for a Nickel a Pop. “The drug in question, metformin, costs about five cents a pill.” Some of them are taking rapamycin. Others are taking cabergoline, though that’s more about adding life to your years. I regard all of these as not sufficiently proved-out (in terms of safety) to try myself.