Several of the supplements he recommends on his show have indeed been found to be either unsafe or ineffective.   His support of Dr. Ohg's secret weight loss supplements in particular has been criticized, and the FDA recently published a warning  about them. However, Dr. Oz has delivered thousands of live surgeries and helped patients achieve enormous improvements in their quality of life, saving lives and improving other aspects of health through his work.   And it's important to remember that Dr. Oz is both a medical doctor and a television personality, and the information he presents on his TV shows is often based on medical research, while other topics are typically expressed as personal opinions.
assistant
I wouldn't say that Dr. Oz's impact has been entirely negative.  His television show and previous books have helped many viewers learn more about a wide variety of health and wellness topics. His medical advice is generally accurate, and he has received many awards and honors for his work, including the National Institutes of Health Director's Pioneer Award, and many others.
assistant
I remember hearing that Dr. Oz was a fraud and not really a credited doctor. Is there any truth to this claim?
user
Dr. Mehmet Oz is in fact a real, licensed medical doctor, and an assistant professor of surgery at Columbia University Medical Center. However, while the information he presents on his TV show is generally accurate and well-researched, some skeptics claim that his show also sometimes includes subjects and advice that haven't been thoroughly studied by the pharmaceutical industry. There are some legitimate concerns about a few of Dr. Oz's medical claims, and especially about his support of the  “Dr. Ohg's Secret Family Formula” weight-loss supplement. However, Dr. Oz has received many awards and honors, including a special National Institutes of Health Director's Pioneer Award for his "groundbreaking work with published studies on prevention, treatment, and losing weight in addition to raising awareness for diseases such as diabetes."
assistant
So his weight loss supplements and some other stuff have been exposed as fake?
user