What people believe about health increasingly depends on how they feel about politics, according to a new poll.

Consider President Trump's Sept. 22 warning about acetaminophen, the active ingredient in Tylenol. KFF, the nonpartisan health policy research organization, polled voters about Trump's statements the day after he made them.

"What we see is that it's hugely divided among partisans," says Ashley Kirzinger, the associate director of polling for KFF. The poll found 59% percent of Democrats believed President Trump's statements about Tylenol were "definitely false." On the other hand, an almost equal percentage of Republicans — 56% — believed the claim to be either "definitely true" or "probably true."

There is no scientific research showing a causal link between acetaminophen an

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