BPC 157 Benefits, Dosage & Before After Results BPC 157 free base CAS#137525 51 0 cytoprotective agent Peptide Series #2 BPC 157 Your body already makes this peptide. BPC 157 is naturally found in your gastric juice it's part of how your gut protects itself. Scientists isolated it, Too often, BPC 157 gets boxed into a single use: injury recovery. Gabriel Alizaidy, MD, MS PDF) Pentadecapeptide BPC 157 Interactions with Adrenergic and Dopaminergic Systems in Mucosal Protection in Stress