Hormones are the new recreational drugs, helping you maintain that zippy youthful feeling even into your 60s and letting you grow cool secondary sex characteristics your own hormones won't. For those reasons, estrogen is one of the hottest black market hormones. Menopausal women and transsexuals denied estrogen therapy by doctors are buying it from shady operators who make roll-your-own mixes of the hormone and don't warn about the side-effects of estrogen supplements (such as blood clots, stroke, and migraines). Now the FDA is pushing pharmacies to stop carrying the drugs, often called "bioidentical hormone replacement therapy," and trying to prevent Web sites from selling them. [PhysOrg]