Masteron Propionate is an injectable steroid which contains the hormone Drostanolone Propionate. Drostanolone Propionate is most commonly used by bodybuilders who are in the "cutting" phase of their training and dieting. While only mildly anabolic, Masteron Propionate is extremely androgenic and because of this, brings about a very pronounced amount of hardness and definition to the muscles. On top of this, Masteron Propionate is also noted as being an effective estrogen blocker, and also binds to SHBG, making it possible for other steroids being used to bind more easily to their respective receptors, thus making their presence in the body much more effective. These effects are also noted by bodybuilders who choose to use the oral preparation of Masteron, Proviron.