Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 GHK CU Copper Peptide Face Serum Robyn's Tack Room ROBYN'S TACK ROOM Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with Turn Back Time with GHK CU Peptides Meet one of the most powerful anti aging peptides in skincare GHK CU. This advanced peptide helps to: Tighten and firm loose skin GHK Cu Copper Peptide Neck & Face Serum Amazon.com: GHK Cu Copper Peptide Serum Anti Aging Face Serum for Skin Firming, Wrinkle Reduction, Hydration & Collagen Boosting, 30ml(1 fl oz) : Beauty & Personal Care