FDA Moves to Reevaluate Several Peptides American Med Spa Association 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 What Is BPC 157? A Medical Clinic's Guide to the Body Protective Peptide, Its Uses, and What It Actually Does Perfect B BPC 157 Ultra Probiotic 60 capsules ProHealth.com