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 Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM GHK Cu Repairing Serum 30ml SumaNurica GHK Cu Copper Peptide Neck & Face Serum The 1% GHK Cu Serum Phyto Exosome By Derma ProLab 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