Masteron belongs to the group of androgenic-anabolic steroids (AAS). Despite the fact that the drug was originally produced as a propionate ester, it is also available as Masteron Enanthate (Drostanolone Enanthate). Masteron was initially developed to combat breast cancer, but today it is mostly used in bodybuilding (during the cutting phase). The drug has shown good results when used to gain lean muscle mass.