GHK Cu 500mg (Copper Peptide) (Topical) Official Peptide Sciences GHK Cu 50mg Modified Aminos GHK Cu (100mg vials) Peptide Partners GHK CU VIAL (50MG) GHK Cu 50MG Raw Amino 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