BPC 157 has already hit the mainstream, but should it hit your bloodstream? Comorbidity of hypertension and lung cancer: interplay of genetics and environment Discover Oncology Springer Nature Link 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 Oral Peptides: FAQs on Bioavailability, Safety, and Clinical Use AJMC