Why it is important to eat food containing fiber?

Fiber is a component of plant foods that is indigestible. There are two types:

Insoluble fibers or "roughage," are found in fruit and vegetable skins and in the bran

layer of whole wheat.

Soluble fibers form a gel in water. Good sources include citrus fruit, barley, oatmeal,

oat bran, and dried peas and beans.