SumaNurica GHK Cu Repairing Serum 30ml MYER The first order degradation profiles of GHK Cu in various medium stored Download Scientific Diagram Thrive Copper Peptide Serum Skin Barrier Support & Hydration 29ml GHK CU 50mg 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