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 GHK Cu for Skin: SIGNAL's Guide to Rejuvenation GHK Copper Peptide Facial Serum 1% GHK Cu wrinkles crow's feet Hair Shedding 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