GHK Cu Copper Peptide Neck & Face Serum Copper Peptides Serum for Face 2% GHK CU & 4% EGF Copper Peptide Regenerating Serum for Glowing Skin and Hair GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) Copper Peptide (GHK Cu) 2% Recovery Serum Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent