Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 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 GHK Cu Peptide Before and After Results GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health The Science and Benefits of GHK Cu Peptide: Skincare, Hair Growth, and Beyond High Tech Copper Peptide Serum 10% Advanced Anti Aging, Skin Repair & Collagen Boosting Serum