GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Excited for radiant skin and luscious hair? GHK Cu is here! Now available for purchaseorder yours today and experience the transformation. Limited stockget yours soon! AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan