superdrol is not a prohormone. It is an much a steroid as d-bol. Superdrol is c-17 methyl alpha masteron. The c-17 methyl addition is the only difference between this and injectable masteron.... and it is only added to survive it's trip through your liver. Superdrol isn't BS. It can be a potent addition to a cycle, but just like any oral.. it shouldnt be run alone imo.