GHK Copper Peptide Spray LowTE Florida Amazon.com: Skin Perfection GHK Cu Copper Peptide Powder 99.7% Pure DIY Copper Peptides Serum for Face and Scalp Cosmetic Grade GHK Cu 1 Gram Creates Up to 100ml for Fuller Hair and What Is GHK Cu? The Copper Peptide That Rejuvenates Skin Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol