Copper, Collagen, and Controversy: Inside the GHK Cu Buzz GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true?, Copper peptide, known as GHK Cu, has a growing body of peer In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega GHK Cu Peptide Benefits for Skin and Hair LIVV Natural GHK Cu: The Regenerative Peptide for Skin, Hair, and Healing Pulse & Remedy