Dehydroepiandrosterone, known as DHEA, is a hormone your body naturally makes (your adrenal glands produce it). Specifically it's called a prohormone because your body needs it to activate the production of testosterone and estrogen. And because of its connection with our sex hormones, we hope taking supplements will, for example, boost our sex drive. But no study can validate that claim. DHEA supplements are marketed with the fountain of youth in mind; in addition to the improved sex drive claims, DHEA is also touted to slow down the aging process, build muscle and boost your immune system. But there's no evidence these supplements can do anything of the sort, either. Studies overwhelmingly find that taking DHEA supplements is no better than taking a placebo.