Legumes
People with ulcerative colitis should also avoid legumes such as peas, lentils, and beans. They are high in protein and fiber. Due to those indigestible components, they would cause gas, bloating, and other conditions. If you experience a flare-up, it is better to avoid the following foods: edamame, lentils, soybeans, soy nuts, adzuki beans, and all beans. Replace them with other sources of lean protein mentioned above to minimize the risks of worsening the symptoms. [11]
