Dear Editor-in-Chief: Ergogenic aids such as anabolic steroids use has health risks including harmful changes in cholesterol levels (increased low-density lipoprotein and decreased high-density lipoprotein), acne, high blood pressure, liver damage (mainly with oral steroids), dangerous changes in the structure of the left ventricle of the heart (1, 2). There is limit information about ergogenic aids use in Iranian adolescents. This report is a part of a large study about substance abuse in adolescents that presents prevalence and incidence of ergo-genic aids use.