BPC 157+GHK Cu Face Serum Skin Repair & Hydration Pure Tides Therapy GHK Copper Peptide Concentrate, cumpr ingredient cosmetic GHK Cu Copper Peptide Neck & Face Serum 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 Copper Peptide Concentrate, cumpr ingredient cosmetic