I'm a longevity doctor 3 peptides to help live longer Steve A new favorite anti aging peptide GHK CU. Help renewal of skin and acts like a magnet for collagen in your body. If you supplement collagen you will want to add this Injectable vs Topical GHK CU: Which Copper Peptide Form Works Best? Sama Says Buy GHK Cu High Quality 99% Pure Peptide Works Buy high quality GHK Cu 50mg (copper peptide) from the UK's leading store Pure Peptides UK GHK Cu Peptide Guide: Uses, Research Value, and Quality