Tylenol Autism Lawsuit [2026 Update] Tylenol Linked To ASD 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. BU Autism Expert Says Research Hasn't Confirmed Tylenol Link The Brink Boston University