Researchers are studying a possible link between acetaminophen (Tylenol) use during pregnancy and higher autism or ADHD risk. It may lower glutathione, an important antioxidant for brain development. Electrochemical evidences in oxidation of acetaminophen in the presence of glutathione and N acetylcysteine Chemical Communications (RSC Publishing) Since everyone is talking about Tylenol let's actually talk about Tylenol. No, it doesn't cause autism But here's what it can do: Deplete glutathione: one of your body's most Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Tylenol's Impact on Glutathione and Liver Damage