Found only in plants, fiber is the part of the plant that cannot be digested by the body. There are several different types of fiber but they are commonly separated into two major classes, soluble and insoluble, both of which should be eaten daily. While some foods are a particularly good source of either soluble or insoluble fiber, such as those listed below, most fiber-rich foods contain both types of fiber. Soluble and insoluble fiber contribute differently to a healthy diet.
Soluble fiber is believed to aid the performance of several bodily functions.
Several studies have found, when combined with a low-fat diet, consuming soluble fiber decreases blood cholesterol and thus may help prevent heart disease. In addition, consuming soluble fiber also helps the body regulate blood sugar level. Thus, it may have a role in the diet of people with diabetes. Insoluble fiber also has health benefits. Acting as a bulk producer in the intestine, insoluble fiber helps the digestive system run smoothly, aiding in the treatment or prevention of constipation, hemorrhoids and other intestinal problems.