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During a highly anticipated announcement today, President Donald Trump urged pregnant people to avoid taking Tylenol if possible because of the painkiller’s possible link to autism.

At the same time, Trump promoted leucovorin, a decades-old medication that mimics folic acid and is often used to restore nutrients in patients who are taking chemotherapy drugs. The folate-based treatment has been investigated in a few small clinical trials as a possible therapeutic for children with autism.

Before we get any further: The link between Tylenol and autism is unclear, and physician grou

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