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 GHK Cu Super Serum w SNAP 8 30ml Peplogix Buy high quality GHK Cu 50mg (copper peptide) from the UK's leading store Pure Peptides UK