The FDA has issued warning letters to multiple companies marketing compounded Retatrutide, an investigational drug from Eli Lilly still in Phase II trials. While early studies have shown promising weight loss results, Retatrutide 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 Warning Letter to Neil R. Feins, M.D. 2009 05 20 Circare FDA Sends Warning Letters to Multiple Companies for Illegally Selling Adulterated Dietary Supplements FDA FDA to weigh easing limits on unproven peptides favored by RFK Jr. and MAHA supporters PBS News FDA to weigh easing limits on unproven peptides favored by RFK Jr. and other MAHA figures