Fibers are found only in plant foods such as whole-grain products, fruits, vegetables, legumes, seeds, nuts etc. Dietary fiber is not a source of calories or minerals or vitamins. Foods appearing fiberous need not be high in fiber like lettuce. Both are important for health. Foods contain different amount and type of fiber.
Some foods are better sources of one type than the other.
Both types of fibers are importnt for good health. Insoluble fiber is a coarse material that does not dissolve in water. It is a roughage. Insoluble fiber should be taken with enough water. It swells and softens the stool and stimulates the intestinal muscles,helping to relieve constipation.