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 Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM GHK Cu Copper Peptide Neck & Face Serum GHK Cu Peptide Serum EQLibrium GHK Cu + SNAP 8 Peptide Serum Anti Wrinkle Firming Collagen Support Skin Care eBay