N-acetyl-cysteine (NAC) is a stable form of the non-essential amino acid LCysteine that is present in a multitude of mucolytic pharmaceutical preparations to treat respiratory conditions that cause excessive mucus production, however, in the field of sport, It is considered a highly appreciated ergogenic aid, since: Improves energy use Increases performance promotes recovery reduces fatigue NAC is a natural glutathione booster and also promotes cysteine production. Glutathione has important main intracellular antioxidant activity and cysteine is also involved in detoxification and is essential for insulin production. How to use 1 tablet daily, preferably before meals. 600MG PER TABLET INGREDIENTS: acetylcysteine (NAC) 49.6%, stabilizer (microcrystalline cellulose), emulsifier (magnesium salts of fatty acids), anti-caking agent (silicon dioxide). Lactose-free, gluten-free.