Health and Human Services Head RFK Jr Falsely Claims: ‘Children Who Are Circumcised Early Have Double the Rate of Autism… Because They are Given Tylenol’

Kennedy was probably referring to a 2013 study of eight countries and a 2015 study from Denmark, both of which claimed to show a link between circumcision and autism rates. Helen Tager-Flusberg, an autism researcher and a professor emerita at Boston University, calls the methods used in those studies “appalling.” Tager-Flusberg leads the Coalition of Autism Scientists, a group that advocates for high-quality autism research.

Neither study shows a causal link between circumcision—or the pain relief medications that are often prescribed along with the procedure—and higher rates of autism. In the decade-plus since each was published, autism researchers have heavily criticized these studies. And after reviewing both studies, scientists last year found no evidence supporting the claim that circumcision leads to autism or any other adverse psychological effects.

There is also very little evidence that giving acetaminophen (sold under the brand name Tylenol) to babies or children increases their risk of being diagnosed with autism. There is also very little evidence, as the secretary of health and human services recently suggested, that acetaminophen taken during pregnancy increases a baby’s risk of developing autism.