Is BPC 157 Immune System Support Really Effective? LIVV Natural BPC 157 Erectile Dysfunction: What the Evidence Shows and Practical Considerations BPC 157: Interesting Biology, Limited Clinical Proof, BPC 157 is biologically interesting, but its not clinically proven. Most evidence is preclinical, and human data is still small and preliminary. Peptides like BPC 157 are everywhere on social media right now. They are most commonly promoted for injury and tendon healing and are often paired with other peptides such as TB 500.