Dr. Mehmet Oz is one of the most influential promoters of outright quackery. I once (many years ago) met him at a meeting where we both were lecturing. My impression was that he does not believe a single word he speaks. Oz later became a TV star and had ample occasion to confirm my suspicion.
Oz’s wife, Lisa, is a Reiki master and has spoken widely of her insights into energy and health. Mehmet Oz appeared as a health expert on The Oprah Winfrey Show. In 2009, Winfrey offered to produce a syndicated series. The Dr. Oz Show debuted in September 2009 and became the most successful promotion of charlatanery in the US. During a Senate hearing on consumer protection in 2014, Senator Claire McCaskill stated that “the scientific community is almost monolithic against you” for airing segments on weight loss products that are later cited in advertisements, concluding that Oz plays a role, intentional or not, in perpetuating these scams, and that she is “concerned that you are melding medical advice, news, and entertainment in a way that harms consumers.” This judgement was supported by a 2014 analysis published in the BMJ; here is the abstract:
Objective To determine the quality of health recommendations and claims made on popular medical talk shows.
Design Prospective observational study.
Setting Mainstream television media.
Sources Internationally syndicated medical television talk shows that air daily (The Dr Oz Show and The Doctors).
Interventions Investigators randomly selected 40 episodes of each of The Dr Oz Show and The Doctors from early 2013 and identified and evaluated all recommendations made on each program. A group of experienced evidence reviewers independently searched for, and evaluated as a team, evidence to support 80 randomly selected recommendations from each show.
Main outcomes measures Percentage of recommendations that are supported by evidence as determined by a team of experienced evidence reviewers. Secondary outcomes included topics discussed, the number of recommendations made on the shows, and the types and details of recommendations that were made.
Results We could find at least a case study or better evidence to support 54% (95% confidence interval 47% to 62%) of the 160 recommendations (80 from each show). For recommendations in The Dr Oz Show, evidence supported 46%, contradicted 15%, and was not found for 39%. For recommendations in The Doctors, evidence supported 63%, contradicted 14%, and was not found for 24%. Believable or somewhat believable evidence supported 33% of the recommendations on The Dr Oz Show and 53% on The Doctors. On average, The Dr Oz Show had 12 recommendations per episode and The Doctors 11. The most common recommendation category on The Dr Oz Show was dietary advice (39%) and on The Doctors was to consult a healthcare provider (18%). A specific benefit was described for 43% and 41% of the recommendations made on the shows respectively. The magnitude of benefit was described for 17% of the recommendations on The Dr Oz Show and 11% on The Doctors. Disclosure of potential conflicts of interest accompanied 0.4% of recommendations.
Conclusions Recommendations made on medical talk shows often lack adequate information on specific benefits or the magnitude of the effects of these benefits. Approximately half of the recommendations have either no evidence or are contradicted by the best available evidence. Potential conflicts of interest are rarely addressed. The public should be skeptical about recommendations made on medical talk shows.
During the presidential campaign in 2016, Oz supported Trump and hosted him on his TV show. In 2018, Donald Trump appointed him to the President’s Council on Sports, Fitness, and Nutrition, Oz was criticized as an example of choosing “pundits over experts”. Recently, Oz announced he intends to run for the U.S. Senate as a Republican.
In April 2020, Oz also spurred controversy because he said that children should be sent back into schools despite the fact that the novel coronavirus pandemic had only just begun and there were no vaccines or therapeutics yet available. “I tell you, schools are a very appetizing opportunity,” he said, claiming that resuming classes “may only cost us 2 to 3 percent in terms of total mortality,” according to his “reading” of medical journals. The mistake was so substantial that Oz later provided a kind of half-apology, saying that he “misspoke.”