As far as I can tell, none of the author's (Public Health Dean Andrea A. Baccarelli) work has demonstrated anything causal, but rather just some correlation. His testimony in a case against Tylenol in 2023 attempting to link the drug to autism was thrown out by the judge for cherry-picking and misinterpretation of study results.

https://www.thecrimson.com/article/2025/9/24/autism-dean-pub...