Jarrow Formulas Glutathione Reduced is the most abundant intracellular thiol (i.e., a compound containing a sulfhydryl [SH] group) and low molecular weight tripeptide found in living cells. The antioxidant functions ofGlutathione Reducedinclude recycling vitamins E and C and serving as an antioxidant in all types of tissues. Jarrow Formulas uses exclusively pharmaceutical-grade glutathione manufactured in Japan. Positively one of the highest quality in the world Glutathione is the most abundant intracellular thiol (i.e., a compound containing a sulfhydryl [SH] group) and low molecular weight tripeptide found in living cells. Thiols such as glutathione, alpha-lipoic acid, and N-acetyl-L-cysteine (NAC) are powerful sulfur-bearing antioxidants. The antioxidant functions of Jarrow Formulas Glutathione Reduced include recycling vitamins E and C and serving as a critical free radical scavenger to support antioxidation in all types of tissues. Glutathione Reduced Highlights Reduced Glutathione (GSH) Capsules Tripeptide: Glycine, Cysteine & Glutamate 500 mg Glutathione Per Capsule A Low Ratio of Reduced vs. Oxidized Glutathione Is Used as a Measure of Cellular Toxicity Meets USP Standard Intracellular Antioxidant Vegan Gluten-Free Dietary Supplement Suitable for Vegetarians/Vegans Veggie Cap Non-GMO Certified by NSF