sources of fiber in food
Sources of insoluble fiber include: 1  whole grain foods. 2  wheat and corn bran. 3  legumes such as beans and peas. 4  nuts and seeds. 5  potato skins. 6  lignans. 7  vegetables such as green beans, cauliflower, zucchini (courgette), celery, and nopal.onsistent intake of fermentable fiber through foods like berries and other fresh fruit, vegetables, whole grains, seeds, and nuts is now known to reduce risk of some of the worldâs most prevalent diseases â obesity, diabetes, high blood cholesterol, cardiovascular disease, and numerous gastrointestinal disorders.