Swanson NAC 150 mg is a dietary supplement containing N-acetylcysteine ​​(NAC) - a highly biologically active form of L-cysteine. Each capsule contains 150 mg of an amino acid derivative for use as a supplement to the daily diet of adults. NAC (N-acetylcysteine) – properties N-acetyl L-cysteine ​​is a modified form of cysteine ​​with an acetyl group attached. Cysteine ​​is an organic chemical compound from the group of endogenous protein amino acids. Together with homocysteine ​​and methionine, it forms a group of amino acids with sulfur. The acetyl derivative of cysteine ​​NAC is a precursor for the synthesis of glutathione, which is mainly concentrated in the liver. The recommended daily dose of the American brand Sawnson is 1 capsule. A pack of 100 Swanson NAC 150 mg capsules will provide 100 days of supplementation.