Health and Human Services Secretary Robert F. Kennedy Jr. admitted on Wednesday he has no "sufficient" proof of a link between Tylenol use during pregnancy and autism, The New Republic reported — even as he affirmed his belief there was such a link.

Kennedy, a conspiracy theorist who has spent years promoting the antivaccine movement with deadly consequences, endorsed the idea earlier this year, despite very limited evidence for the claim, and despite the fact that Tylenol use in pregnancy has actually decreased as autism diagnoses rose.

"While speaking about President Donald Trump’s controversial TrumpRx program, Kennedy made a crucial clarification about the administration’s recent claims linking autism to Tylenol, the number one drug prescribed to pregnant patients for pain relief and fever reduction," said the report. Kennedy went on to say, “The causative association between Tylenol given in pregnancy and perinatal periods is not sufficient to say it definitely causes autism, but it is very suggestive.”

Doctors have broadly disregarded the Trump administration's position for lack of evidence, as Tylenol remains one of the only pain relievers available to pregnant women with minimal known risks to fetal development.

However, President Donald Trump has run with the claim, proclaiming, “Don’t take Tylenol. Don’t take it! Fight like hell not to take it!” and that women experiencing pregnancy-related pain should just "tough it out."

Meanwhile, Texas Attorney General Ken Paxton, a far-right figure currently running for U.S. Senate, announced a lawsuit against the manufacturer of Tylenol for supposedly concealing autism risks.