NAC contains 500 mg of the highest-quality USP grade N-Acetyl-L-Cysteine in a vegetarian capsule.NAC is a powerful free radical scavenger. The majority of orally ingested NAC rapidly undergoes deacetylation to form L-Cysteine. L-Cysteine is necessary for glutathione production. NAC's role in glutathione production has powerful implications for improving immune function and increasing the body's free radical trapping capacity. In addition, NAC has been used with good results in supporting respiratory function. NAC has well-known mucolytic properties and has been shown to increase mucociliary transport in smokers.Recent studies have shown favorable evidence for the use of NAC in several psychiatric and neurological disorders – particularly autism, Alzheimer's disease, cocaine and cannabis addiction, bipolar disorder, depression, trichotillomania, nail biting, skin picking, obsessive-compulsive disorder, schizophrenia, drug-induced neuropathy and progressive myoclonic epilepsy. In addition, research studies have shown preliminary evidence for the effectiveness of NAC in disorders such as anxiety, attention deficit hyperactivity disorder, and mild traumatic brain injury.