Why Fiber is Essential in Diet ?
Fiber also known as roughage is found in the skin and pulp of certain fruits and vegetables, and also in nuts and seeds. Fiber in food does not get digested by the human body, and is excreted through the wastes. An individual needs about 25-30 grams of fiber per day. Fiber is of two kinds, soluble fiber and insoluble fiber . These are discussed below in more detail: Soluble fiber - The soluble fiber absorbs water and turns to gel during digestion. It makes the stool soft, and helps in its movement through the intestines. An important function of soluble fiber is in lowering cholesterol; it binds to the cholesterol, and helps in its excretion from the body. Also, the soluble fibre when ingested in food helps to regulate the blood sugar. It does this by slowing down the digestion, and preventing sudden release of energy into the blood stream, especially from the carbohydrates. This also keeps the body full for longer time. The soluble fiber sources are dried beans, oranges, apples...