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The Facts Behind Claims on Autism, Tylenol and Folate

Extensive studies, including sibling comparisons of nearly 2.5 million children, found no causal evidence linking acetaminophen or folate deficiency during pregnancy to autism risk.

Summary by Fact Check
News reports have indicated Health and Human Services Secretary Robert F. Kennedy Jr. may point to Tylenol and folate deficiency in his promised announcement on the causes of autism. But neither Tylenol nor folate deficiency has been shown to cause autism. Some evidence has pointed away from Tylenol as a risk factor.

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  • 50% of the sources lean Left, 50% of the sources are Center
50% Center

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Fact Check broke the news in on Wednesday, September 17, 2025.
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