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Michael Herschel Greger (born October 25, 1972) is an American physician, author, and speaker on public health issues best known for his advocacy of a whole-food, plant-based diet, and his opposition to animal-derived food products.
In 1998, Greger appeared as an expert witness testifying about bovine spongiform encephalopathy when cattle producers unsuccessfully sued Oprah Winfrey for libel over statements she had made about the safety of meat in 1996. He later enrolled at Tufts University School of Medicine, originally for its MD/PhD program, but then withdrew from the dual-degree program to pursue only the medical degree. He received his MD in 1999 as a general practitioner specializing in clinical nutrition.
In 2004, he launched a website and published a book critical of the Atkins Diet and other low-carbohydrate diets. That same year, the American College of Lifestyle Medicine was founded, and Greger was a founding member, and fellow.
In 2005, Michael Greger joined the farm animal welfare division of the Humane Society of the United States as director of public health and animal agriculture. There years later, he testified before the United States Congress after the Humane Society released its undercover video of the Westland Meat Packing Company, which revealed downer animals entering the meat supply. This led the USDA to mandate the recall of 143 million pounds of beef, some of which had been routed into the nation's school lunch program. In 2011, Greger founded the website NutritionFacts.org, with funding from the Jesse & Julie Rasch Foundation.
Greger's third book, Bird Flu: A Virus of Our Own Hatching, received a favorable review which said it was "interesting and informative to both scientists and lay persons". Public health expert David Sencer was critical of the book, writing that it "focuses heavily on doomsday scenarios and offers little in terms of practical advice to the public" and that "a professional audience would quickly put the aside for more factually correct sources of information".
In 2024, Morgan Pfiffner of Red Pen Reviews gave his sixth book, How Not to Diet a score of 50% for its scientific accuracy and a score of 75% for its healthfulness. Pfiffner commented that "While much of the book is well supported by research, there are a significant number of fairly questionable claims, leading to a handful of dietary recommendations that seem unnecessary, too restrictive, or potentially counterproductive". He also argues that Greger's claim that a whole food plant-based diet can reverse heart disease is questionable. According to Pfiffner this has not been demonstrated as the randomized controlled trial that he cited from Dean Ornish did not show regression of atherosclerotic plaque.
Harriet Hall argues that, while it is well-accepted that it is more healthy to eat a plant-based diet than a typical Western diet, Greger often overstates the known benefits of such a diet as well as the harm caused by eating animal products (for example, in a talk, he claimed that a single meal rich in animal products can "cripple" one's arteries), and he sometimes does not discuss evidence that contradicts his strong claims. Joseph A. Schwarcz of McGill University argues that although Greger takes his information from respected science journals and produces impressive videos, he has a vegan agenda and cherry picks his data. He adds, "Of course that doesn't mean the cherries he picks are rotten; they're fine."
Career
In 2001, Greger joined the Organic Consumers Association to work on mad cow issues, on which he spoke widely as cases of the disease appeared in the US and Canada. Previously in 1994, in a Cornell University animal rights publication, Greger highlighted the results of a survey in Britain that appeared to support the view of a microbiologist at the University of Leeds that mad cow disease was "much more serious than AIDS". A decade later, in early 2004, the Daily Bruin, the student newspaper of the University of California, Los Angeles, reported that Greger had called mad cow disease the "plague of the 21st century". However, Greger later denied ever making such a statement, clarifying that he had merely posed it as a question during a speech. That same year, Greger cited a study and said that "thousands of Americans may already be dying because of Mad Cow disease every year".
Reception
Greger's books have appeared on The New York Times Best Seller list multiple times, including How Not to Die three times, How Not to Diet, and How Not to Age once each.
Publications
Greger advocates for a general move away from a Western pattern diet to a whole-food, plant-based diet. He has been critical of the USDA, stating that "a conflict of interest right in their mission statement" protects the economic interests of food producers in lieu of clear dietary guidelines.
(2025). 9798991660501, NutritionFacts.org. EAN 9798991660501
Bibliography
United States House Committee on Energy and Commerce (2025). 9780160840036, United States Government Publishing Office. . ISBN 9780160840036
External links
Categories: Official Website, 1972 Births, Living People, 20th-century American Physicians, American Ashkenazi Jews, American Food Writers, American Founders, American Nutritionists, American People Of Jewish Descent, American Primary Care Physicians, American Veganism Activists, Plant-based Diet Advocates, Tufts University School Of Medicine Alumni, Vegan Cookbook Writers
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