What are the different types of anabolic steroids?
Testosterone, like many other hormones, is produced only at certain sites in the body. It does very limited, specific functions and is quickly metabolized. When testosterone was found to build muscle tissue and to cause the development of male secondary sex characteristics, medical researchers tried to use testosterone to treat diseases that caused the loss of musclemass. Unfortunately, testosterone in its natural form has a half-life of only about ten minutes in the body. This means that half of the dose of testosterone is metabolized away in as little as ten minutes after it is absorbed. Half of what remains is broken down every ten minutes after that. At the end of an hour, none of the original dose of testosterone can be detected in the body. Injecting natural testosterone into muscle can make it last as long as ten hours, but this is still not nearly long enough to be useful as a medicine. Medicinal chemists began to alter natural testosterone in an attempt to make drugs that woul
