Health Questions and Answers

Question: What is Fiber?


Fiber is material from plant cell walls that is resistant to digestion by enzymes of the human small intestine. Fiber is often classified according to its solubility in water. Water-soluble fibers (pectin, gums, mucilages, and some hemicelluloses) tend to be efficiently broken down by bacteria in the colon. Water-insoluble fibers (lignin, cellulose, and the remaining hemicelluloses) pass through the body mostly unchanged. Dietary fiber is a complex mixture of both.

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