I spent 4 months reporting on the peptide BPC 157 and its unlikely journey from a research lab in post communist Croatia to today's MAHA movement. Ask me anything. : r IAmA 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 BPC 157: What the Research Says About Healing and Recovery Yoo Direct Health 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, The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University