2 weeks in on GHK Cu and the glow is REAL., Brighter complexion, More even skin tone, Less breakouts, Softer fine lines, Thicker, fuller hair, This is just the beginning. Consistency is Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size 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 Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B