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 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 (Copper Peptide) LeadWest Medical GHK Cu Injections in Napa & Sonoma Amazon.com: GHK Cu Copper Peptide Supplement, 120mcg High Purity Supplement for Skin & Hair, Enteric Coated for Maximum Absorption, Vegan & Gluten Free (60 Count) : Health & Household