BPC 157 and Female Fertility: Effects, Mechanisms, Safety and Risks BPC 157 has already hit the mainstream, but should it hit your bloodstream? BPC 157 is one of the peptides that has been getting a lot of attention recently. It is a synthetic peptide derived from a protein found in human gastric juice. In experimental research, BPC 157: Miracle Healing Peptide or Hidden Danger? BPC 157 is being promoted across podcasts, wellness clinics, and social media as a powerful healing peptide said to repair tendons, reduce inflammation, and speed recovery from injury. But when Flynn McGuire, a