When using peptides, the Sub Q tissue is the correct space for injection. Here is a simple guide on how to find this space. Remember to use sterile technique, please call or 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 SUBCUTANEOUS INJECTIONS Subcutaneous Injection Sites and Instructions for Safe Self Administration The Complete Peptide Guide: Reconstitution, Injection & Storage Extension Health