Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience People are searching for the GHK Cu pen. Ordering it online. Trying to figure out how to use it safely at home. We looked at all of that and thought: there has to Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum Ghk cu Copper Peptide Repair Serum Firming, Collagen Boost, Skin Renewal, Anti aging Face Serum Etsy 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 GHK CU Copper Peptide Face Serum Robyn's Tack Room ROBYN'S TACK ROOM