Autism and Tylenol: Exploring the Evidence on Acetaminophen in Pregnancy NAM Acetaminophen and Autism: What You Need to Know Autism Research Institute Studies show children with autism have significantly lower levels of glutathione, the body's master antioxidant. Without enough glutathione, the body struggles to eliminate toxins, making it harder to cope with everyday Tylenol (acetaminophen) does not cause autism. The FDA, in its statement that there may be an association, confirmed that "a causal relationship has not been established, and studies of millions of children 79. Tylenol, Leucovorin, Glutathione, & Autism Autism Dietitian