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 Copper Peptides Serum for Face 2% GHK CU & 4% EGF Peptide Labz Copper Peptide 12% GHK CU Serum, Hyaluronic Acid, Anti Aging, 1 fl oz Walmart.com Multi Peptide + Copper Peptides 1% The Ordinary 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