The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, GHK CU Infiniwell InfiniWell TRIO GHK Cu, Argireline & Leuphasyl Cream B. Health Shop Amazon.com : InfiniWell Duo Scalp & Hair Serum for Hair Growth Encourage Visible Fullness Physician Formulated Nourish Follicle Health & Support the Strength & Structure of Strands (25 ml) : InfiniWell Pure Prescriptions