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, Is topical GlycylLhistidylLlysine copper (GHKCu) safe for adults, and what are the risks, contraindications, and considerations for systemic use, pregnancy, lactation, and children? GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Frontiers Copper toxicity and deficiency: the vicious cycle at the core of protein aggregation in ALS