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 Copper Peptides Serum for Face 2% Copper Peptide with 4% Epidermal Growth Factor (EGF Serum) Niacinamide Ceramides Squalane & Hyaluronic Acid Multi Transform Your Skin: GHK CU Before & After Results Ghk Cu Treatment Before And After Real people. Real results. No hype. We didn't ask Stephanie to do anything special. No ring light, no filter, no professional photos. Just her bathroom mirror and 3 weeks of consistency.