Nandrolone Phenylpropionate (NPP) is a synthetic androgen and anabolic steroid. It is a derivative of testosterone and was first marketed in the early 1970s. NPP is used mainly in the treatment of conditions such as anemia, osteoporosis, and performance enhancement in athletes. Defining what Nandrolone Phenylpropionate (NPP) is? Whatever your bodybuilding goals are, you…