Amazon.com: Asterwood Copper Peptides Serum for Face with GHK Cu Peptide and Hyaluronic Acid Anti Aging Facial Serum 1 Fl Oz : Beauty & Personal Care Acemuk N Acetylcysteine NAC 600mg, Supports Respiratory Health, Glutathione Detox, Antioxidant, 20 Tablets Walmart.com Active just means the serum contains a functional, lab verified concentration of real GHK Cu copper peptide not just colour or trace copper. Our formula includes 300mg of pure GHK Cu (1% concentration) in 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 Skin Biology Super GHK Copper Serum VS Asterwood Naturals Copper