FDA to weigh easing limits on unproven peptides favored by RFK Jr. and other MAHA figures On August 15 2025, the U.S. Food & Drug Administration (FDA) issued a Warning Letter to Platinum Biologics LLC for marketing umbilicalcordderived products including exosome products (NanoEx & Nano Xsomes) without approval. The U.S. Food and Drug Administration is moving toward allowing compounding pharmacies to produce more than a dozen injectable peptides that were banned because of potentially significant safety risks, the New York FDA to weigh easing limits on unproven peptides favored by RFK Jr. and MAHA supporters PBS News FDA Warning Letter to Neil R. Feins, M.D. 2009 05 20 Circare