Peptide Labz Copper Peptide 12% GHK CU Serum, Hyaluronic Acid, Anti Aging, 1 fl oz Walmart.com Biossance Squalane + Copper Peptide Rapid Plumping Serum Buffet" + Copper Peptides 1% The Ordinary Sephora 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 Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM