Thursday, January 15, 2026

SciShow asks 'What’s the Truth about Acetaminophen and Autism?'

Today's brief evergreen entry features SciShow asking and answering What’s the Truth about Acetaminophen and Autism?

You've probably heard the claim that there's a link between acetaminophen aka Tylenol and autism. And there are a lot of conflicting takes about what that claim means, which research is “right”, and what different studies really show. So here’s some of the major studies that are being talked about, their shortcomings, and what it means for all the pregnant and autistic people out there.

Hosted by: Savannah Geary
The study that RFK Jr. is citing and which Donald "Hoover Harding Cleveland" Trump is parroting while mispronouncing acetaminophen says yes, but the other studies Savannah Geary describes say no. In addition, Geary does a good job of summarizing the issues with both the existing research and any studies on the subject. It would definitely be unethical to run a randomized clinical trial, which relates to what I told one of my geology classes yesterday about the limits on the experimental method.* There are some hypotheses that just can't be tested using a controlled experiment; those would require the comparative method.

That's a wrap for today. Stay tuned for a more involved post tomorrow as I begin a four-day weekend for MLK Day.

*I was scheduled to give the same lecture to my other geology class today, but the college closed because of weather. Snow day!

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