Copper Peptides for Skin: The Science, Benefits, and Best Practices Hubmed What are the potential side effects and adverse reactions of topical copper peptide? GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B No, were not actually injecting copper , GHK Cu is a peptide your body already makes (just less of it as you age). It binds to copper and helps signal repair., Why people are into it:, supports GHK Cu Topical Cream