60 servings 120 capsules
N-acetylcysteine (NAC) is an acetylated form of the amino acid L-cysteine. It has antioxidant, anti-inflammatory, and mucolytic properties. NAC is converted to L-cysteine after ingestion, which, in turn, is converted into glutathione, a powerful antioxidant. Free L-cysteine is readily oxidized in solution, encouraging the formation of insoluble precipitates. In contrast, NAC is more stable and has a much lower toxicity than free L-cysteine, making it safer and more effective for increasing cysteine levels in the body.
(https://examine.com/supplements/n-acetylcysteine/)