Vegetarianism is a plant-based diet that may include eggs and/or dairy, but abstains from the meat of any animal. Some vegetarian diets include fish, in which case they are often referred to as pescatarian diets. People choose vegetarian diets for health reasons as well as out of concern for animal welfare, land use, and other environmental concerns.
Dr. Michael Greger explores the reason why he became a doctor and started his non-profit, Nutrition Facts. Using examples pulled from medical research and resources, Dr. Greger poses his answer to the question, "Is there a safe, simple, side-effect free solution to the obesity epidemic?"