Supports respiratory function, glutathione production and detoxification* N-Acetyl-l-Cysteine (NAC) is a derivative of the dietary amino acid l-cysteine. NAC has a high affinity for lung tissue, which it supports through mucolytic and antioxidant action. NAC supports tissue levels of glutathione, a key component of the antioxidant defense system.* • Supports cellular antioxidant defense system* • Promotes healthy lung tissue* • Made with hypoallergenic ingredients