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N-Acetyl-l-Cysteine (NAC) is a cellular antioxidant support that specifically promotes healthy lung tissue. N-Acetyl-l-Cysteine (NAC) is a free radical scavenger that supports glutathione levels in tissues.‡ Supports cellular antioxidant defense system‡ Promotes healthy lung tissue‡ Made with high-quality ingredients backed by verifiable science Suggested Use Take 1 capsule, 1-3 times daily, between meals.