Aesthetics Infinity Medical Institute GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? 6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates Why does Glycyl Histidyl Lysine Copper (GHK Cu) cause pain or discomfort? GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Arctic Peptide Research Grade Peptides for Performance & Recovery Europe