GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay Buy GHK Cu Peptide Vial Peptide Works GHK Cu Copper Peptide Serum with Niacinamide, Hyaluronic Acid and Mushroom Extract 1% Copper Tripeptide 1 Anti Aging Formula, 1 oz Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent