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, 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 Acetaminophen Toxicity: How Genetic Susceptibility Combines with Environmental Factors Is Tylenol Safe During Pregnancy? Understanding Risk Factors Seeking Health