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Antioxidant SupportFeaturing AjiPure®Dietary SupplementPotent Antioxidant That Supports Brain And Liver HealthSupports Detoxification of Environmental Toxins And PollutantsScience-Backed Quality Since 1969Swanson AjiPure N-Acetyl L-Cysteine is an antioxidant form of cysteine used for its liver- and brain-supporting properties. N-Acetyl L-Cysteine—commonly called NAC—is a potent antioxidant and a powerful precursor to cellular glutathione a "master nutrient" for longevity. Produced through fermentation using raw ingredients of non-animal origin AjiPure amino acids are 99–100% pure. Impurities in other brands can be six times higher!AjiPure amino acids stand for purity efficacy and safety. Ajinomoto is the leading supplier of amino acids for medicinal use so you can be sure to trust the best.