GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great), GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki