Key points

The causes of autism remain unknown and elusive.

There have been many proposed causes, including genetic, neurological, and environmental factors.

Identifying risk factors for autism is not the same as discovering causes.

It is better to complete credible studies than to prematurely announce a cause.

President Trump was surrounded by key medical officials in his administration including the Secretary of Health and Human Services on September 22, 2025, when he implied that taking acetaminophen (Tylenol) during pregnancy causes autism: “… acetaminophen which is basically commonly known as Tylenol during pregnancy, can be associated with a very increased risk of autism.” [1]

Additionally, the president suggested a new potential “treatment” for autism: “The FDA will be upd

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