Drugs that improve athletic performance are often used inside the walls of the gym, during bodybuilding competitions and by athletes in everyday life. A popular remedy that can be purchased as an additive is prohormone, a chemical compound also known as an androgen, which is sold without a prescription. Manufacturers claim that supplements with prohormone build muscle and burn fat, and, unlike steroids, they are allowed to be used. Many weightlifters, bodybuilders and other athletes turn to steroids and hormonal supplements, such as prohormone, to improve their athletic performance and / or increase muscle size. Learn more about prohormones and the risks associated with using these dietary supplements.