Anabolics are primarily medical drugs. They were synthesized on the basis of testosterone and growth hormone in the 30s of the last century and immediately won the love of doctors. The medicine began to be used to treat a wide range of diseases. Note! Then steroids were considered a completely harmless drug. 

They also did not know how to detect it in any biological fluid. Later, veterinarians became interested in them - with their help, injections steroids it was possible to significantly increase the strength and endurance of horses. 

You probably already guess what this led to? Yes, coaches and athletes are also interested in steroids. At first, the doctors did not mind, but the athletes began to exceed the modest dosages without exception. In the 60s, doping became a real plague, affecting bodybuilders right and left.