I've been using Pentadecapeptide (PDA) and the results have been unreal. this peptide is almost identical to BPC 157 with the exception of an additional marginate salt, which has contributed to The Wolverine Peptide Stack: BPC 157 + TB 500 Dosage and Protocol BPC 157 has already hit the mainstream, but should it hit your bloodstream? What does the U.S. Food and Drug Administration say about BPC157?