The first order degradation profiles of GHK Cu in various medium stored Download Scientific Diagram Advanced GHK Cu Copper Peptide Serum 1% (300mg 30 ml (Pack of 1) Copper Peptide Solution, 1% Ghk cu in Double Hyaluronic Acid Serum Etsy 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 Hyaluronic Acid 2% + GHK Cu (Serum) G Lab Peptides