Have you heard of GHK Cu? It's one of our favorite regenerative peptides right now. This copper peptide was originally discovered in human plasma and plays an important role in skin repair and Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed GHK Cu Copper Peptide: The Ultimate Peptide For Longevity GHK Cu peptide is the ultimate tool of biohacking your skin. Injectable GHK Cu peptide works as a repair signal inside your skin. And when the skin functions better, the visible effects follow: Reduced Peptides, Drugs And Supplements: Science, Risks, And Alternatives Los Angeles Times