What is the source of peptide BPC 157 (Body Protection Compound)? What Is BPC 157? A Medical Clinic's Guide to the Body Protective Peptide, Its Uses, and What It Actually Does Perfect B BPC 157: What to Expect When You Start or Stop Taking It Not all peptides are created equal. And not all peptide sources are safe. At Synergy, every protocol starts with a complimentary consultation with a provider who actually knows what they're doing.