Was told to take an iron supplement every night.. then the next day.. gets super constipated. what are some good, delicious healthy foods to stop constipation?

These: Soluble fibre: peas, soybeans, oats, rye, chia, barley, prunes, plums, avocados, berries, ripe bananas, skin of apples, quinces, pears, broccoli, carrots, sweet potatoes and onions insoluble fiber: whole grain wheat, corn, bran, beans, peas, nuts, seeds, potato skins, green beans, cauliflower, zucchini, celery, and nopal, avocado, unripe bananas, skins of kiwi, grapes and tomatoes.