Compounding warning letters to 503A facilities between 2017 and 2021 ScienceDirect Beyond the Headlines: FDA Warning Letters to GLP 1 Compounders Spencer Fane The FDA just put peptides like BPC 157, TB 500, and KPV on the clock. , As a compounding pharmacist, this is literally my world and most people dont understand the regulatory nuance behind what FDA mulls compounding for peptides previously flagged over safety risks BioSpace