GHK Cu copper peptides, 60 mg solution for preparation SEMAX POLAND GHK Cu 50mg Research Peptide Ameano Peptides GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes GHK cu is a copper peptide. It's great for skin, especially when you combine it with other things. My favorite is DMSO and derma rolling. My first experience with copper peptides was Procytes