Masteron enanthate (Drostanolone) is a dihydrotestosterone (DHT) derivative that is altered by the addition of a methyl group at the carbon 2 position to increase its anabolic effects. It is a very popular anabolic steroid due to it displaying moderate anabolic and low androgenic characteristics. The addition of the enanthate ester makes Mastogen 200 a long acting hormone.

In Bodybuilding Mastron is most commonly used in cutting cycles to harden the body and improve muscle density and is an effective aromatase inhibitor (AI). It can also be used to support enhanced fat loss, for decreasing body fat %, and most commonly as a precontest agent for bodybuilders and athletes who compete.