GHK Cu (Copper Peptide) AzulBotanicals ReMed HydraPen (GHK Cu) Blue Copper Peptide Serum 2 x 5 ml Microneedling MorySkin 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 Pptido de cobre GHK GHK Cu Tripptido 1 Advanced GHK Cu Neck & Face Serum Premium Quality