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 50mg Vial Copper Peptide Pure Bio Labs Buy high quality GHK Cu 50mg (copper peptide) from the UK's leading store Pure Peptides UK GHK Cu Peptides for Research 99% Purity Guaranteed