About dietary fiber, what constitutes dietary fiber i.e. bran, cellulose and other plosysaccharides, its sources and the functions of dietary fiber.

Fiber is the indigestible part of the diet that comes from plants and meat. It consists of bran, cellulose and other polysaccharides. It is widely distributed in wholemeal flour, the husks of cereals and in vegetables. Dietary fiber is partly digested by microbes in the large intestine with gas formation. The daily requirement of fiber is not less than 20 g.

Functions of dietary fiber


Provides bulk to the diet and helps to satisfy the appetite
Stimulates peristalsis of the alimentary tract
Attracts water, increasing bulk and softness of feces
Increases frequency of defecation preventing constipation
Prevents some gastrointestinal disorders, e.g. diverticular disease.

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