Tylenol can lower the body's key antioxidant, glutathione, though this isn't seen on routine labs. But mechanistic data clinical proof, so we still need good trials. The Tylenolautism link isn't clear. PDF] Evidence that Increased Acetaminophen use in Genetically Vulnerable Children Appears to be a Major Cause of the Epidemics of Autism, Attention Deficit with Hyperactivity, and Asthma Semantic Scholar The Surprising Connection Between Glutathione and Autism Golden Care Therapy There is no conclusive evidence that acetaminophen use during pregnancy causes autism in children. Read Acting NYC Health Commissioner Dr. Michelle Morse's statement