FDA Peptide Reclassification: What This Means For Weight Loss, Recovery, And More 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 FDA Puts BPC 157, TB 500, and 5 Other Peptides Under the Microscope: What Prescribers Need to Know About the 503A Review Lengea RFK Jr. & claimed regenerative peptides like BPC 157 The Niche BREAKING FDA UPDATE MASSIVE FOR PEPTIDES The U.S. Food & Drug Administration is reportedly reclassifying 14 peptides from Category 2 ( compounding only, no legal prescribing) into Category 1. This means