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 N Acetyl Cysteine (NAC) + Glycine 800mg 60 Caps GHK Cu Copper Peptide for Research GhostLabz 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 Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb