GHKCu Copper Peptide Therapy Skin & Healing Regeneration GHK Cu Peptide: What It Does for Body Composition and Metabolic Health One Month with GHK Cu Peptide Serum: Skincare Review 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 Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000