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 Peptide Therapy for Radiant Skin by Desert Mobile GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia