ATD (1,4,6-Androstatrien-3,17-dione) is a strong inhibitor of estrogen biosynthesis. In pharmacology was used as a specific anabolic-androgenic steroid, having not only impact on improving the structure and aesthetics of the body, reduce of fat or acting as an agent for increasing and regenerating of muscle mass and strength, but also, by used along with the androgens (male steroid hormones), on the development of male sex organs. The uncontrolled ATD use increased levels of testosterone above the physiological needs, which led to a reduction of its sales and recognition as the doping substance. The use of ATD by athletes can bring a positive anti-doping test result. After the checks Chief Sanitary Inspector availability of ATD in Poland is small.