l Cysteine Glutathione Mixed Disulfide, a Novel Bioavailable Sulfhydryl Modified Glutathione Precursor, Protects against Early Liver Injury Induced by Short Term Hypercholesterolemia Chemical Research in Toxicology Glutathione Precursor Complex Swanson Antioxidant NAC and DAO I spoke with someone yesterday who believes that Acetylcysteine suppresses the production of diamine oxidase. Carol Savage (could someone pl tag her for me?) Do you know As I mention in my book, N acetyl cysteine (NAC) is not found in food sources, but in the body, it converts into cysteine. NAC acts as a precursor to glutathione, a powerful N Acetyl Cysteine NAC Best NAC Supplements Uncovered: How N Acetyl L Cysteine Supports Health and Wellness