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, AHK Cu Proven Copper Peptide Treatment NEOVA Topical Copper Peptides High Quality Skin Care Solution GHK Cu Copper Peptide Neck & Face Serum GHK Cu Peptide (50mg) Advanced Skin Rejuvenation & Healing Support Topical Copper Peptides High Quality Skin Care Solution