Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term food intolerance or non-allergic food hypersensitivity refers to adverse physiological reactions to a specific food, beverage or a compound found in foods. Although medics remind that food intolerance should be distinguished from food allergies, food intolerance as well causes undesirable symptoms such as nausea, abdominal pain, bloating and diarrhea. Learn more about food intolerance, its causes, symptoms and management in this book.