Some athletes and bodybuilders use so-called "dietary supplements" that are legal, unregulated substances in the United States. These substances are not subject to the same testing for safety and effectiveness as all over-the-counter and prescription medications in the . Most of their effects are believed to be hugely overstated by their marketers, but no one really knows what the effects might be. In addition, no one really knows what their dangers might be. On of these supplements is called Andro. It is a legal substance that the body converts into testosterone, a regulated steroid. How efficiently this converted testosterone might be used is unknown. Scientists have not been able to prove that Andro creates desirable effects. In addition, it may be as harmful as other types of testosterone and synthetic testosterone.
The gains made by athletes in uncontrolled observations have been much more impressive. Weight gains of thirty or forty pounds, coupled with thirty percent increases in strength, are not unusual. Such case studies lack credibility because of the absence of scientific controls. However, it would be foolish to completely disregard such observations because the "subjects" have been highly trained and motivated see the articles on pharmacology of sport and sports medicine in the countries of the former Soviet Union for more information on anabolic steroids.