N-Acetyl-L-Cysteine Capsules for Food Supplements N-Acetyl-L-cysteine (NAC) is an L-amino acid and an important precursor of the body's own antioxidant glutathione, which fights free radicals and helps prevent disease. A dietary supplement with NAC capsules ensures that the contained N-acetyl-L-cysteine is converted into glutathione and that all cells in the body can benefit from the antioxidant effect. As a dietary supplement, NAC can also promote the excretion of heavy metals in the liver and kidneys, support the regeneration of liver cells, and neutralize substances that are toxic to the liver. For this reason, acetylcysteine is used in medicine, for example, for paracetamol poisoning. In addition, NAC capsules with their active ingredient have an expectorant effect and are used for various diseases of the upper respiratory tract (for example, bronchitis). N-acetyl-L-cysteine promotes the dissolution of mucus in the bronchi by liquefying and eliminating secretions. Many other health benefits are known. How to use: Take 2 capsules a day with plenty of water half an hour before meals.