Testosterone is the most potent, naturally occurring androgen that is formed in the human body.

Synthetic testosterone itself would be developed in the 1930’s. In 1937 the first ester controlled testosterone would hit the market thanks to Schering and their new Testosterone Propionate product. This would allow for more control over the testosterone hormone by regulating its time release. However, in the early 1952’s a larger ester in Cypionate would be attached to the hormone thereby slowing down the hormone’s activity even more.

Testosterone cypionate is very similar to testosterone enanthate which been developed 2 years before. Although half lives and active life periods are different, they are similar. Injections are normally less frequent for cypionate. Testosterone is the king of all bodybuilders and for this purpose is also fairly cost effective.