Comes from all plant foods and can be broken down into two types. – (1) Viscous fiber, previously known as soluble fiber, is found in fruits, legumes, barley, and oats, and has been shown to lower blood glucose and cholesterol. Foods containing viscous fiber are released more slowly into the bloodstream from the intestinal tract. – (2) Cellulose fiber, also called insoluble fiber. It is found in whole wheat, grains, cereals, and nuts. Unlike viscous fiber, cellulose fiber does not dissolve and is excreted completely, and allows bowel movements to pass easily and occur more regularly.
