Known as the “mother of hormones,” DHEA (dehydroepiandrosterone) is needed by the body to produce many types of hormones including estrogen and testosterone. DHEA is secreted by the adrenal glands-located on top of the kidneys-as well as by the skin, brain, testicles, and ovaries. Although women make less DHEA than men, in both sexes DHEA production declines dramatically with age; levels are 80%lower at age 70 than at age 30. The significance of these falling DHEA levels, however, has not been determined.