Category 1 vs. Category 2. The FDA's peptide update, explained. Category 2 peptides are on the FDA's difficult to compound list, which effectively blocks licensed pharmacies from producing them. Category 1 means RFK Jr. & claimed regenerative peptides like BPC 157 The Niche FDA takes first step in possible reversal of ban on some peptides The Washington Post Understanding the Legal Risks of BPC 157 and Other Unapproved Peptides Holt Law FDA Puts BPC 157, TB 500, and 5 Other Peptides Under the Microscope: What Prescribers Need to Know About the 503A Review Lengea