99% Copper Peptide Ghk Cu Powder What Makes GHK Cu Copper Peptides Blue? GHK CU Color Vitali Skincare 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 Amazon.com : Molu Premium GHK Cu Copper Peptide Powder, >99% Purity, Ideal for DIY Formulations 1 gram : Health & Household