... 15% 2 no preservatives 3 protect cells 4 used in Cosmetic Glutathione (GSH) is a which contains an unusual peptide linkage ... preservatives can be used as antioxidant in food, medicine and cosmetic. GuidelinesItemsContentsAppearanceYellowish PowderMoisture, % ≤6.0Ash, % ≤20.0Glutathione, % ≥15Heavy Metal, ppm ≤20As ... ,000E.coli, MPN/100g ≤30 "Angel" Glutathione Yeast Extract for cosmetic