l cysteine as far as I know is an amino acid...found in human hair etc.....used to bond certain chemicals etc but I believe since this amino acid is found in food a few years back they outlawed the...
N-acetyl-l-cysteine (NAC)approved uses include "mucus-dissolving" in various respiratory conditions. NAC is often administered with a nebulizer in such cases. NAC is also used to treat various...