What is Primobolan steroid？ Primobolan steroid is a synthetic steroid used primarily for increasing muscle mass, strength, and reducing body fat. It comes in two forms: Methenolone Acetate, an oral tablet, and Methenolone Enanthate, an injectable solution. Primobolan steroid is derived from Methenolone, a type of synthetic testosterone. It is often used by bodybuilders and athletes during bulking and cutting …