GHK Cu (Copper Peptide) AzulBotanicals Buy GHK Cu Peptide High Purity Copper Tripeptide Pretty Peptide 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 Blue Copper Peptide Ghk Cu 99% Care Ghk Cu 50mg 100mg vials Cosmetic Ingredient GHK GHK CU and blue copper