Testosterone was first synthesized in Germany in 1935 and was used medically to treat depression. Professional athletes began using anabolic steroids during the 1954 Olympics, when Russian weightlifters were given testosterone. In the 1980s, anabolic steroid use began to extend into the general population, and young men began using these substances, sometimes to enhance athletic performance but in most cases to improve personal appearance.

This guide has been voluntarily compiled to help you understand the Testosterone molecule and its functions in the body in detail. It has been meticulously focused on providing up-to-date information, free from information pollution on the Internet. Scientific references related to the information are given at the end of the relevant pages. You can start learning the basics of testosterone, testosterone deficiency and the diseases it causes, their treatments, and the use of testosterone as a performance enhancer.