GHK Cu Face Serum 1200MG Copper Peptide Tablets Your skin knows GHK Cu. Your body makes it naturally, then makes less of it with age. We concentrated it. Three formulas. One peptide. Each paired with a single bioactive, chosen for a 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 GHK CU Crescent Chems Research