Testosterone esters were synthesized for the first time in 1936, and were found to have greatly improved potency relative to testosterone.  Among the esters synthesized, testosterone propionate was the most potent, and for this reason, was selected for further development, subsequently being marketed.  Testosterone propionate was introduced in 1937 by Schering AG in Germany under the brand name Testoviron.  It was the first ester of testosterone to be introduced,  and was the major form of testosterone used medically before 1960.  In the 1950s, longer-acting testosterone esters like testosterone enanthate and testosterone cypionate were introduced and superseded testosterone propionate.  Although rarely used nowadays due to its short duration,  testosterone propionate remains medically available. 
Muscles are important components of the human body. They are necessary for our harmony development and hight quality life. Elastic muscles make your body not only hard, powerful, but also beautiful. Athletes and professional bodybuilders decide to buy testosterone cypionate after they find out what great effects it brings to their body. But before you start using steroids for sale it you need to understand the importance of some special techniques known as post cycle therapy to avoid some unwanted side effects and to avoid any damage to your system.