Buy GHK Cu: Powerful Skin Regeneration Peptide GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has 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 Organic Copper Peptide GHK CU Anti Aging Moisturizer Lightweight Hydrating Cream Buy GHK Cu Pre Mixed Peptide from Peptide Works