Fact Check: Can Tylenol Cause Autism? Frontiers Improving Antioxidant Capacity in Children With Autism: A Randomized, Double Blind Controlled Study With Cysteine Rich Whey Protein 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. Read Our Blogs Philadelphia Integrative Psychiatry