1-Dehydroepiandrosterone (also known as 1-andro, 1-DHEA, 1-androsterone or 5ñ-androst-1-en-3ò-ol-17-one) is a synthetic, orally active anabolic-androgenic steroid (AAS). It is an androgen prohormone of 1-testosterone (dihydroboldenone), 1-androstenedione, and other 1-dehydrogenated androstanes. The drug has been sold on the Internet as a designer steroid and "dietary supplement". It is a positional isomer of dehydroepiandrosterone (DHEA; 5-dehydroepiandrosterone).