GHK Cu Peptide: What It Does for Body Composition and Metabolic Health Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum So, what are we talking about? GHK Cu It's completely changed how I think about skin and aesthetics. Instead of freezing muscles or adding volume, this approach supports the skin at a Copper Peptide (GHK Cu) 2% Recovery Serum 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