N-Acetyl-L-Cysteine, or N-A-C, is an acetylated form of the amino acid cysteine. Cysteine is the most important precursor to glutathione (GSH), the most critical antioxidant produced in the body. It has been used for over 30 years for respiratory health, providing relief to those suffering from chronic respiratory conditions such as the annoying post-nasal drip, sinusitis, chronic bronchitis, and the congenital disease cystic fibrosis.Acetylated cysteine is better absorbed than regular cysteine. AOR’s N-A-C is an excellent choice for those looking for a single supplement to promote overall health. People suffering from chronic respiratory conditions may also benefit from regular use of N-A-C.AOR AdvantageAs the precursor for the important antioxidant glutathione, AOR’s NAC provides a wide range of health benefits in an effective dosage.