COPPER PEPTIDES FOR HAIR GROWTH Ultrastrong 10% GHK Cu Formula with Sonora Supply Co. Intense Copper Binding GHK Cu 5% +Palmitoyl Oligopeptide 0.3% Repair S Chebo Clinic Defy GHK Cu (glycyl L histidyl L lysine) is a naturally occurring copper binding peptide found in human plasma. As levels decline with age, so may its support of the biological processes involved in collagen production, skin GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B