Copper Peptide Serum (GHK Cu) Nardo's Natural Private Label 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 Peptides Serum, Copper Peptides Serum for Face Tightening, Repairing, Collagen Boosting with Hyaluronic Acid Fragrance Free TikTok Shop 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,