Nandrolone Phenylpropionate is a small ester base anabolic steroid and is commonly referred to as NPP. For the off-season athlete, a bulking cycle, Nandrolone Phenylpropionate is one of the best steroids he can choose to enhance muscularity and size. This is one of the best mass builders available and for many bodybuilders is used in every bulking plan. On the basis of the hormone’s function, Nandrolone Phenylpropionate is identical to Nandrolone Decanoate. Both forms are comprised of the same active hormone. In the case of NPP we have a shorter ester version that gives a larger burst of Nandrolone after injection, but also carries a much shorter half-life. This means Nandrolone Phenylpropionate has to be injected more frequently than its larger ester counterpart if blood levels are to remain stable.