The phrase "anabolic steroids" refers to testosterone derivatives that are utilised for their anabolic qualities in either clinical settings or by athletes. For decades, scientists have questioned testosterone and its derivatives' anabolic effects on normal men. The majority of scientists believe that anabolic steroids do not boost muscle size or strength in adults with normal gonadal function, and that positive results are skewed by athletes' high expectations, bad study design, or inadequate data processing. Any state in which nitrogen is differentially held in lean body mass, either by stimulation of protein synthesis and/or decreased protein breakdown anyplace in the body, is referred to as anabolism. The principal gonadal steroid in males, testosterone, has significant anabolic effects in addition to its effects on reproduction, which may be seen in young boys and when hypo gonadal men undergo testosterone replacement therapy . Athletes' use of anabolic steroids is a contentious topic.