Dehydroepiandrosterone (DHEA) is a steroid hormone produced by the adrenal glands. The DHEA test is a blood test that measures the levels of DHEA in the body. DHEA plays a role in the production of androgens and estrogens, which are sex hormones. DHEA levels typically peak in the 20s and decline with age. DHEA testing may be used to evaluate adrenal function, particularly in cases of suspected adrenal insufficiency. It may also be used to evaluate fertility and menstrual disorders, as well as to monitor treatment for certain conditions such as lupus, depression, and osteoporosis. However, the clinical utility of DHEA testing remains controversial, and more research is needed to fully understand its role in health and disease.