Book excerpt: Important new information in the second edition includes; The roles of fiber, gluten, lactose, and fructose in the development and treatment of IBS; The use of probiotics and antibiotics to treat IBS; Similarities and differences between IBS and inflammatory bowel disease (IBD); The relationship between small intestine bacterial overgrowth and IBS; How to make the most of your visits to a gastroenterologist; Lifestyle modifications that can improve symptoms of IBSMaking Sense of IBS is an essential resource for anyone who has symptoms or a diagnosis of IBS as well as for health professionals who treat people with this complex disorder.