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 Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Could Copper Peptides Reverse Hair Loss and Inflammation? YouTube Two Ingredients. Real Hair Transformations. How Neurogan Health's GHK Cu Serum Is Changing What Customers Expect From Hair Care Morningstar