Tylenol, Autism, And The Glutathione Connection OC Integrative Medicine The recent discussion about acetaminophen (Tylenol) and autism has raised understandable concerns, but decades of high quality research is clear acetaminophen use during pregnancy does not cause autism. While the causes of Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health Frontiers Improving Antioxidant Capacity in Children With Autism: A Randomized, Double Blind Controlled Study With Cysteine Rich Whey Protein Tylenol, Autism, and Leucovorin: What Parents Need to Know. 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.