Acetaminophen (Tylenol) Use in Pregnancy: Autism Concerns The headline Tylenol causes autism has sparked concern. But the science tells a more nuanced story. Some observational studies have found that when pregnant women used more acetaminophen, their Mark Hyman, 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. The Surprising Connection Between Glutathione and Autism Golden Care Therapy Read Our Blogs Philadelphia Integrative Psychiatry