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: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality We are obsessed with GHK Cu, the skin healing, collagen stimulating copper peptide that works from the inside out., This medical grade peptide helps calm inflammation, smooth fine lines, restore The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, GHK CU