BPC 157 Banned: Key Facts on the Latest FDA Decision Peptide BPC 157(HEXADECAPEPTIDE) Synthagen Synthagen PL Research Articles Peptide Research USA 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 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.