Solaray 

N-acetyl-cysteine (NAC) is derived from L-cysteine an amino acid, which takes part in multiple metabolic functions, such as the formation of skin, nails, and hair. N-acetyl-cysteine plays an essential role in the synthesis and maintenance of glutathione which makes it one of the most powerful antioxidants in the body. NAC helps maintain sufficient glutathione inside cells. NAC N-Acetyl-Cysteine Solaray is recommended for the prevention of winter infections with a fatty cough, such as bronchitis and sinusitis. NAC can support the body in the process of heavy metal detoxification.