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 99% Pure Copper Peptides (ghk cu) Great for DIY 1 Gram Etsy GHK Cu is a copper peptide used in regenerative medicine to support collagen production, tissue repair, and cellular renewal throughout the body. It's for individuals looking to improve skin firmness, brightness, and visible GHK Cu Copper Peptide Serum with Niacinamide, Hyaluronic Acid and Mushroom Extract 1% Copper Tripeptide 1 Anti Aging Formula, 1 oz GHK Cu (Copper Peptide) Cream 30gm Valhalla Vitality