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 Pentadeca Arginate vs BPC 157: Benefits and Differences Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype PDA IS REPLACING MY FAVORITE PEPTIDE BPC 157. Well the FDA screwed up several peptides for a lot of us BUT We have just gotten our hands on an almost identical peptide called