BPC 157 vs. Pentadeca Arginate (PDA): Unlocking the Healing Power BPC 157 Oral vs Injection: Which Is More Effective? Amino Innovations 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 PDA or Pentadeca 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 BPC 157 in Australia: Benefits, side effects, risks and legality