Primobolan, commonly known as Primo, is the brand name for the anabolic androgenic steroid Methenolone. It comes in two forms: Methenolone Enanthate (injectable) and Methenolone Acetate (oral). Known for its mild nature and low androgenic properties, Primobolan is a derivative of dihydrotestosterone (DHT). This minimizes the unwanted side effects of other steroids when stacked together while enhancing their effects, making Primo a favored choice among athletes and bodybuilders seeking muscle mass and strength with fewer side effects.