“Though pigs have been proven susceptible to a porcine spongiform encephalopathy, the National Pork Producers Council claims that no naturally occurring cases of 'mad pig' disease have ever been discovered.”

American physician, author, and public health speaker

Michael Herschel Greger is an American physician, author, and public health speaker known for his advocacy of a whole-food, plant-based diet and his criticism of animal-derived food products. He has built a large audience around nutrition, health, and preventive medicine. He founded NutritionFacts.org, a site that shares videos and research on diet and nutrition. He is also the author of How Not to Die, How Not to Diet, and How Not to Age, all of which became New York Times best sellers.