What Is BPC 157? The Healing Peptide & How It Works BPC 157 Ligament: 1 Unsafe Truth 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. Dr. TLDR: BPC 157 has not been proven to cause cancer. But it has also not been proven safe in people with active cancer, recent cancer, premalignant conditions, suspicious lesions, or high