Soluble fibers include gums, mucilages, pectin, and some hemicelluloses. Soluble fiber is found in the flesh of fruit like apples and insoluble fiber is found in the outer skin of fruit, oats, and dried beans (see Table 2.4). When eaten, soluble fiber slows down the movement of food through the lower part of the digestive tract, which delays hunger sensations.
Fiber also slows down the release of glucose from other foods into the body, which may be beneficial to someone with diabetes who needs to control blood sugar. Soluble fibers also bind with cholesterol in foods and help to lower blood cholesterol levels.
Insoluble fibers include cellulose, lignin, and some hemicelluloses. Insoluble fiber is found in foods like bran (wheat bran, corn bran,
Table 2.4 Good Sources of Fiber FOOD Breakfast Cereals