A Harvard researcher whose study about Tylenol’s effects on pregnant women underpinned President Trump’s Monday warning to expectant mothers to avoid the drug was once a paid expert witness in a lawsuit against the manufacturer — and was ripped by a federal judge for unreliable, sloppy work.

Dr. Andrea Baccarelli, dean of the Ivy League institution’s T.H. Chan School of Public Health, co-authored a study analysis last month linking acetaminophen — the pain reliever’s active ingredient — to neurodevelopmental disorders including autism.

The conclusion of the analysis, first reported by the Times of London, warned pregnant women to “limit acetaminophen consumption to protect their offspring’s neurodevelopment.” 3

Food and Drug Administration Commissioner Dr. Marty Makary approv

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