Cellular Glow Copper Peptide GHK Cu Serum for Face Pptido de cobre GHK GHK Cu Tripptido 1 The Power of Blue: Why GHK Cu Is the Unsung Hero of Youth Let's talk about the blue magic no one's talking enough about GHK Cu peptide (that gorgeous blue serum you've 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