Amazon.com: TOSOWOONG Copper Peptide Face Serum, Anti Aging with Copper Tripeptide, GHK Cu, 12 Multi Peptide Formula for Fine Lines, Firming, Skin Elasticity, Hydrating, Korean Skincare, 33ml 1.11 fl.oz. : Beauty & Personal Care Copper Tripeptide 1 GHK Cu 1% Solution 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 Not all copper peptide serums are created equal And this is where a lot of people get confused. You'll see copper peptides on the label and expect amazing results but the GHK Cu Copper Tripeptide 1 Research Reagent Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000