BPC 157 vs. TB 500: Which One Actually Works? Dr. McKenna's Orthopedics and Biologics Texas In 2023, the FDA deemed 19 peptide drugs too unsafe to be dispensed by compounding pharmacies, which mix components of approved drugs to create bespoke medication for people who have trouble taking 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 FDA to weigh easing limits on unproven peptides favored by RFK Jr. and other MAHA figures What are peptides, are they safe and is there evidence to back up the hype? Weight loss drugs The Guardian