Testosterone Decanoate is one of the many esterified forms of testosterone and is a long form of the testosterone as it offers a long half life after administration. This is actually an androgen and anabolic steroid and a testosterone ester, a potent long acting injectable male synthetic hormone. Testosterone Decanoate is second longest acting form of testosterone after Testosterone Undecanoate. As with any other form of testosterone, the only difference between them is in the half life (the release time of the hormone after it got administered).
