GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution Pptido de cobre GHK GHK Cu Tripptido 1 The research on GHK Cu goes back over 40 years a scientist dedicated his entire career to it. Your body already makes it. You just make about 60% less of it by Amazon.com: Lovely Southern GHK Cu Peptide Serum 1.5% Copper Peptides Anti Aging Facial Serum for Fine Lines, Skin Elasticity, Made in USA, 1 Fl Oz : Beauty & Personal Care 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), Copper Peptide (GHK Cu) Serum