The TV personality who describes himself as “America’s doctor” has been widely delivering medical advice with zero scientific basis, according to a new study.

About half of recommendations from Dr. Mehmet Oz have “no evidence” or are flat-out contradictory to medical research, according to a study published by the British Medical Journal this week.

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“The public should be skeptical about recommendations made on medical talk shows,” the researchers warn after assessing 80 claims from Oz’s show, as well as 80 recommendations on a British medical show.

Oz’s recommendations contradicted medical research about 15 percent of the time. His claims lacked any evidence in about 40 percent of his claims.

The television personality, who often promotes products for rapid weight loss on his show, has faced criticism as high as Congress this year. He appeared before a Senate panel in June where he was blasted by lawmakers.

The Daytime Emmy-award winner has a broad reach: his show on the Oprah Winfrey Network regularly attracts about 2.9 million viewers daily.