Emrald Labs GHK CU Capsules Health Rating & Analysis Oasis superPeptide 1% GHK Copper Peptide Serum Pure & Cimple Copper Peptide (GHK Cu) 2% Recovery Serum Most people think GHK Cu works because it's a skin peptide. That's surface level thinking. #GHK Cu doesn't start with wrinkles, scars, or hairlines. It starts with cellular repair signalling. GHK Cu is a copper peptide GHK Copper Peptide GHK Cu Tripeptide 1