Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Meet the ingredient your skin has been waiting for. GHK Cu, or Copper Tripeptide 1, is one of the most researched anti ageing actives in skincare. It firms. It renews. It supports collagen. And now Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1200mcg (1 oz bottle) GHK Cu (Copper Peptide) Provider Supervised Therapy IV Glow Bar Natural Copper Peptide Serum Booster 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