what foods cause ibs constipation
Any food or fluids that tend to dehydrate a person is likely to trigger constipation in people with IBS (irritable bowel syndrome). Foods that people with IBS should avoid include: 1  Chocolate. 2  Dairy products such as milk and cheese (particularly those that contain lactose), 3  Red meat, 4  Unripe bananas.5  Items that contain caffeine if you are slightly dehydrated.oods that help prevent constipation. Foods that help prevent constipation in people with and in other people include: 1  Prunes. 2  Various types of beans. 3  Whole grain breads like rye bread. 4  Pears and fruits like kiwi.