Copper Peptide (GHK Cu) 2% Recovery Serum Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Organic Copper Peptide GHK Cu Anti Aging Moisturizer Lightweight Hydrating Cream 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), Neurogan GHK Cu (Copper Peptide) Neck & Face Serum 1,200mcg (1 oz bottle) GHK Cu Skin Serum Peptide Rejuvenation GOAL.MD