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Respiratory HealthExtra StrengthDietary SupplementSupports Healthy Respiratory FunctionPotent Antioxidant That Supports Liver Health and Detoxification PathwaysScience-Backed Quality Since 1969Breathe easier with NAC! This unique derivative of the amino acid L-cysteine is trending and for good reason. It offers potent support for both respiratory health and detoxification. Swanson NAC offers 1 000 mg N-acetyl cysteine per serving to support multiple systems for total-body health.NAC (N-acetyl cysteine) promotes healthy respiratory function through its antioxidant properties. NAC also stimulates production of glutathione the body’s master antioxidant. Healthy glutathione levels help the body fight oxidative stress from free radicals support immune system function and may even promote healthy aging. NAC also supports healthy levels of glutamate a neurotransmitter that is central to learning behavior and memory. Additionally NAC and glutathione support the body’s detoxification pathways for healthy liver function.Support your lungs liver immune health and more with NAC from Swanson.