Test P

Testosterone Propionate is Testosterone with the Propionate ester bound to the Testosterone molecule. More specifically ‘Propionate’ is Propionic acid, but once bound to Testosterone it can be referred to as an ester bond. Esterified anabolic steroids tend to be more fat-soluble, thus allowing Testosterone to release slowly from the injection site. Once Testosterone Propionate enters the bloodstream, the bond between the ester and the hormone are broken down by enzymes which takes a varying amount of time depending on which ester is coupled with the Testosterone molecule. The ester bond is removed by enzymes, which results in pure Testosterone which is plays its role in the body. This also results in slower Testosterone release rates. Testosterone alone with no ester bonded to it possesses a half-life of approximately 2 – 4 hours. With the Propionate ester attached to it, the half-life of Testosterone is now extended to 2-3 days, providing a slower release and activity of the drug.