FDA Peptide Reclassification: What This Means For Weight Loss, Recovery, And More Major peptide regulatory news this week. The FDA announced on April 15 that it will remove 12 peptides from Category 2 of the 503A bulk drug substances list after seven calendar days. Development of 503B Bulks List 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 BREAKING: The FDA just reversed their 2023 peptide ban. 12 peptides pulled from the Category 2 restricted list: 1. BPC 157 2. Thymosin beta 4 fragment (TB 500) 3. Epitalon 4. GHK Cu 5. MOTS C 6.