FDA Targets GLP 1 and Peptide Compounding, Advertising and 'Research Use Only' Labeling 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care 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 Copper Peptide (GHK Cu) 2% Recovery Serum