N.A.C. (N-Acetyl-Cysteine)
N-acetyl-cysteine (NAC) is an acetylated form of the amino acid cysteine which is more efficiently absorbed. It is also an antioxidant that is helpful in fighting viruses. It is commonly used to help break down mucus and to protect from acetaminophen toxicity. In addition, it helps the body to synthesize the antioxidant glutathione.