Health Secretary Robert F. Kennedy Jr. has in recent months teased a September announcement in which he would identify the cause of autism. This week, some close to the Trump administration and one major news outlet suggested Kennedy could point in the direction of acetaminophen use during pregnancy as one possible link.

The Wall Street Journal reported Friday that Kennedy was planning to announce a link between autism and Tylenol use by pregnant women, as well as autism and low levels of folate (an essential vitamin that helps the body produce cells), among other potential causes. NBC News has not confirmed that reporting.

Tylenol’s active ingredient is acetaminophen, a drug that is known as an analgesic, which can help with pain relief. Many over-the-counter drugs contain acetaminoph

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