Robert F. Kennedy Jr. has recently claimed that “early” circumcision is associated with higher autism rates, which has sparked significant backlash from medical experts, Jewish groups, and autism organizations. His comments center on a supposed chain of causation involving infant circumcision, the use of Tylenol (acetaminophen), and autism—an idea specialists describe as unsupported and potentially harmful.

What RFK Jr. actually said

  • In an October 2025 White House cabinet meeting, RFK Jr., as U.S. Health and Human Services Secretary, said there are “two studies that show children who are circumcised early have double the rate of autism.”
  • He added that it is “highly likely because they are given Tylenol,” linking the autism risk not directly to circumcision itself but to acetaminophen use around the procedure.
  • Reports note that he framed this within his broader campaign warning pregnant women and parents about Tylenol and autism, even though the evidence he cites is weak and controversial.

How he later defended or clarified it

  • After the backlash, RFK Jr. said media outlets distorted his remarks to imply he claimed circumcision causes autism, insisting his concern was about Tylenol given around circumcision.
  • He referenced a “preprint” (a non–peer-reviewed paper) and a Danish study on ritual circumcision, saying these support an association between acetaminophen exposure and autism, not circumcision alone.
  • He positioned himself as raising legitimate questions about drug safety that others are allegedly trying to suppress.

What studies he was talking about

  • Commentators point out that he was likely referring to a 2013 multinational study and a 2015 Danish study, which reported correlations between circumcision and autism diagnoses.
  • In the Danish cohort, circumcised boys were about 46% more likely to be diagnosed with autism spectrum disorder by age 10, with a subgroup of boys under 5 appearing roughly twice as likely—numbers that RFK Jr. simplified as “double the rate of autism.”
  • Autism researchers have described the methods in these papers as “appalling” and stressed that correlation in such observational studies does not prove that circumcision or Tylenol causes autism.

Reaction from experts and communities

  • Medical and autism experts have strongly rejected RFK Jr.’s circumcision–Tylenol–autism linkage as not grounded in rigorous, robust research.
  • The UK’s National Autistic Society called his comments “dangerous anti-science” and warned that they could put lives at risk by sowing fear and confusion around needed medical care.
  • Jewish leaders and politicians, including Rep. Jerry Nadler, accused him of trafficking in antisemitic rhetoric because circumcision is a core Jewish religious practice, even though he did not explicitly mention Jews.

Key takeaways

  • RFK Jr.’s basic claim: early circumcision is associated with roughly double the autism rate, which he attributes to Tylenol use around the procedure, not the surgery itself.
  • Scientific consensus: existing data do not establish that circumcision or acetaminophen causes autism; the studies he leans on are methodologically weak and heavily criticized.
  • Political and social impact: his remarks have become a flashpoint in debates about vaccines, autism, “anti-science” rhetoric, Jewish religious practices, and the responsibilities of high-ranking health officials.

Information gathered from public forums or data available on the internet and portrayed here.