Insoluble fiber is a type of dietary fiber that does not dissolve in water. It is found in foods like whole grains, nuts, seeds, and the skins of fruits and vegetables. This fiber adds bulk to the stool, helping to promote regular bowel movements and prevent constipation. Insoluble fiber plays a crucial role in digestive health. By moving through the digestive tract, it helps to keep the intestines clean and may reduce the risk of developing certain gastrointestinal disorders. Including adequate amounts of insoluble fiber in your diet can contribute to overall well-being.