Dietary fiber - What is it?
A dietary fiber is an essential part of a good healthy diet. A dietary fiber is one, which includes all the parts of the plant foods that the human body cannot absorb. Dietary fiber is unlike the other food stuffs such as proteins or carbohydrates, which breaks down in the intestine and absorbed. It goes through your stomach and intestine unchanged to your colon.
The fiber is classified in to two categories namely water soluble fiber and water insoluble fiber. The water soluble fiber is a type of fiber, which dissolves in water, forming a gel like material, which helps in lowering the blood cholesterol and glucose levels. The water insoluble fiber is another type of fiber that promotes the movement of the material through the digestive system. It increases the stool bulk hence can benefit people who are struggling with constipation. The type and amounts of the fiber depends and varies according to the plant source.
What is the importance of dietary fiber?
The dietary fiber such as cellulose, hemi cellulose, lignin, gums, pectin and polysaccharides are which cannot be digested by the human body. They can help a lot in treating the disorders in the large intestine. The large intestine or colon is where the digestion completes. Here the excess water is removed from the food wastes and when the wastes pass through it quickly, the water is not absorbed properly resulting in diarrhoea and other disorders. Here the dietary fiber helps in moving the food in the correct rate. These fibrous substances also absorb water resulting in bulkier stools. This helps in preventing constipation and straining.
Studies have shown that the rural Africans eliminate their food waste in one-third the time it takes for the people from urban areas. It also believed that the harmful substances are wiped out from their body.
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