Sources: U.S. Food and Drug Administration (FDA) Compounding and the FDA (503A & 503B guidance) FDA warning letters on unapproved peptide products National Institutes of Health (NIH) PubMed The Hidden Risks of BPC157: What Patients Need to Know About Contamination and Safety Regenexx at New Regeneration Orthopedics Peptides are a HUGE category. Were talking about everything from insulin to GLP 1s Some are incredibly well researched and FDA approved., But in the injury recovery world? Thats where it gets a BPC 157: Miracle Healing Peptide or Hidden Danger? Multifunctionality and Possible Medical Application of the BPC 157 PeptideLiterature and Patent Review