Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum GHK Cu Blue Copper Peptide Serum Buy High Purity GHK Cu Blue Powder Copper Peptide CAS 49557 75 7 89030 95 5 Cosmetics Grade from Hangzhou Hyper Chemicals Limited ECHEMI 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