FDA Proposes to Exclude GLP 1s From 503B Bulk List Drug Topics FDA has removed certain bulk drug substances that were placed on the category two list and has announced it will consult the Pharmacy Compounding Advisory Committee (PCAC) for potential future inclusion of Check out FDAs new roster of bulk drug substances being pulled from use in compounding. Youll see BPC 157 and TB 500 among the various peptides added to the list of category 2 substances The peptide conversation is shifting. Secretary RFK Jr. recently announced that the FDA plans to move 14 peptides from Category 2 back to Category 1 restoring FDA recognized status and making them FDA Peptide Reclassification 2026: What Researchers Want Navigating the FDA's Final Interim Policy on Compounding with Bulk Drug Substances: A Guide for 503A Pharmacies and 503B Outsourcing Facilities Buchanan Ingersoll & Rooney PC