Peptides in the Limelight: US FDA May Ease Restrictions on Several Peptides The Dermatology Digest Peptides are everywhere right now but heres the part most people miss:, Not all peptides are FDA approved., FDA regulated: insulin, GLP 1 medications, certain hormone peptides, Not FDA Targets GLP 1 and Peptide Compounding, Advertising and 'Research Use Only' Labeling RFK Jr. promotes peptides. Now the FDA weighs easing limits on the unproven chemicals