preprint

The findings were first shared as a preprint on bioRxiv on July 16, 2025, and later published in the journal Current Biology on October 24.

According to his tweet, the two studies he was referring to at the cabinet meeting were a Danish study from 2015 and a non-peer-reviewed preprint posted online in August, which refers to the Danish paper.

As for the preprint, contrary to Kennedy’s description, it did not identify the Danish paper as offering “the most compelling ‘standalone’ evidence” for an autism-acetaminophen link.

The studies Kennedy referenced were mischaracterized, with one being criticized for relying on a very small sample and another being a non-peer-reviewed preprint that studied mice rather than human children.

The paper, which is now available as a preprint, recommended that regulatory agencies “consider increasing awareness of these hazards and make clear recommendations for implementing protective measures at the worksite.”