GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Most people treat GHK Cu like it's only for hair and skin. The real leverage is in the copper signaling + repair pathways that everyone overlooks. You don't need every peptide under the GHK Cu 10 g (10% Concentrate, 100,000 ppm) Lrak Technologies 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