Copper Peptides GHK Cu Beef Tallow for Skin: Blue Balm with Methylene Blue, Manuka Honey & Vitamin E Natural Face and Body Moisturizer for Mature, Dry & Sensitive Skin 2oz Copper Peptide GHK CU Conditioner for Hair Growth Mall of California superPeptide 1% GHK Copper Peptide Serum Pure & Cimple GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping