GHK Cu Copper Peptide Serum 1% w w (300mg Copper Tripeptide 1) + Multi peptide complex #copperpeptideserum #blueserum #ghkcuserum #topicalghkcu Helloskin GHK Cu 1% Triple Peptide Regenerative Serum Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix GHK cu 3% Serum Copper Peptide