Cysteine is an amino acid that the body is able to transform into antioxidants like glutathione.[1] N-acetylcysteine, also commonly called acetylcysteine, is a form of cysteine that has been specially modified.[2] While cysteine is available in many high-protein foods, such as chicken, turkey, pork, and dairy, N-acetylcysteine (NAC) is not actually found in any food.[3] Rather, N-acetylcysteine is generally consumed as a capsule or administered intravenously.[4] (more…)