GHK Cu and Erectile Dysfunction: What the Evidence Actually Shows Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed GHK Cu Sundrata Clinic 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 Transform Your Skin: GHK CU Before & After Results