What are anabolic steroids? Anabolic steroids are synthetic (man-made) versions of testosterone. Testosterone is the main sex hormone in men. It is needed to develop and maintain male sex characteristics, such as facial hair, deep voice, and muscle growth. Women do have some testosterone in their bodies but in much smaller amounts. What are anabolic steroids used for? Health care providers use anabolic steroids to treat some hormone problems in men, delayed puberty, and muscle loss from some diseases. But some people misuse anabolic steroids. Why do people misuse anabolic steroids? Some bodybuilders and athletes use anabolic steroids to build muscles and improve athletic performance. They may take the steroids orally, inject them into muscles, or apply them to the skin as a gel or cream. These doses maybe 10 to 100 times higher than doses used to treat medical conditions. Using them this way, without a prescription from a health care provider, is not legal or safe. What are the healt...