Sisu NAC - 600 mg - N-acetyl-L-cysteine is a natural, sulphur-containing amino acid and a powerful antioxidant that has shown itself to be an effective detoxifier and a natural strengthener of the immune system. As a detoxifier, NAC can protect against the toxic effects of some heavy metals, herbicides and other environmental pollutants, and is useful in fighting certain cancers and reducing the toxic effects of some chemotherapy drugs. As an antioxidant, NAC can play a role in heart disease prevention by naturally lowering levels of lipoprotein buildup, and by fighting free-radical buildup following a heart attack. NAC has also proven effective as a fighter of bronchopulmonary disorders such as chronic bronchitis, asthma and cystic fibrosis, by breaking up mucus and facilitating its elimination.