British Medical Journal: More than half of Dr. Oz’s advice is wrong or baseless

After getting chastised by Congress earlier this year for promoting products that don’t have “scientific muster,” Dr. Oz’s credibility was dealt another major blow this week: The British Medical Journal published a new study that shows less than half of Dr. Oz’s recommendations are actually supported by science. The study also examined The Doctors — and they fared only slightly better.

“Recommendations made on medical talk shows often lack adequate information on specific benefits or the magnitude of the effects of these benefits,” the researchers concluded. “The public should be skeptical about recommendations made on medical talk shows.”

For the study, investigators randomly selected 40 episodes of The Dr. Oz Show and The Doctors from early 2013. They then randomly selected 80 different recommendations made on each show and had them evaluated “by a team of experienced evidence reviewers.” Here’s what they found…

The Dr. Oz Show: Only 46 percent of the recommendations were supported by case studies or “better evidence,” 39 percent of the recommendations didn’t have any supporting evidence and 15 percent had completely contradictory evidence.

The Doctors: 63 percent of the recommendations were supported, 24 percent were baseless and 14 percent were contradicted.

The study also confirmed that Dr. Oz’s favorite category is dietary advice, with 39 percent of his recommendations related to diet. The Doctors‘ most common recommendation was to consult with a healthcare provider. (I can’t imagine “talk to your doctor” would ever be seen as bad advice, which may explain why their stats are a bit better.) Both shows only address potential conflicts of interest less than 1 percent of the time.