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, Buy GHK CU Nasal Spray Cyprus Direct SARMS Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com BLUE PEPTIDE SPRAY Young Goose Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum 7% GHK CU ACCELERANT Platinum Skin Care