Think twice before injecting peptides bought online: unauthorized products can seriously harm you Canada.ca BPC 157: What It Is, What We Know, and Why Its Use for Arthritis Remains Unproven San Diego Orthobiologics Medical Group Peptide BPC 157 Does It Work? Breaking Down the Evidence and the Hype 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