This serum contains 1% pure glutathione to bring out the transparency of your skin. It's the INJESK GS10000 Duo Drip Serum x 2. This is a new, unopened item, but please refrain from purchasing if you are sensitive to items stored at home. Thank you. GLUTATHIONE 1% INJESK GS 10000 Duo Serum Pure Glutathione 1%