GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic GHK Cu Copper Peptide Neck & Face Serum Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference 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 Cosmetic for Healthy Skin Aging and Wrinkle Support Fullscript GHK Cu Cooper Peptide: The Complete Skin & Repair Guide (2026)