sources of insoluble dietary fiber
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.oluble fiber is found in varying quantities in all plant foods, including: 1  legumes (peas, soybeans, lupins and other beans). 2  oats, rye, chia, and barley. 3  some fruits (including figs, avocados, plums, prunes, berries, ripe bananas, and the skin of apples, quinces and pears).