GHK Cu Repairing Serum 30ml SumaNurica 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 GHK Cu: Skin Healing, Anti Aging, & Hair Growth Benefits 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 Cu Peptide Before and After: What to Expect for Skin and Hair