Masterone Propionate is an agonist of the androgen receptor. It is not a substrate for 5a-reductase and is a poor substrate for 3a-hydroxysteroid dehydrogenase, and therefore shows a high ratio of anabolic to androgenic activity. As a DHT derivative, drostanolone is not a substrate for aromatase and hence cannot be aromatized into estrogenic metabolites. It is one of the best steroid for fat burning. Masterone Propionate is used in powerlifting, because it has the ability to increase strength. Short ester helps us in the end of the cycle and before important competition.