Which fiber functions as a prebiotic and alter the microbiota?
Dietary fiber is cellulose, which is indigestible to humans. Starch is made up of the two polysaccharides amylose and amylopectin. These are long complex glucose molecules which provide energy to the body more slowly than simple sugars. By weight, starch is mostly amylopectin, which is soluble and easily digested. Amylose is a prebiotic, is insoluble and is digested more slowly than amylopectin.
Fiber is generally used to prevent constipation, diverticular disease and various other bowel problems. Different types of fiber are used for different things. Soluble fiber, generally found in bran, is known to help reduce blood cholesterol levels and normalize blood sugar levels. Whereas insoluble fiber, found in nuts and seeds, is known to help with bowel regularity. Most plant sources contain a mixture of both soluble and insoluble fibers. Hope that helps =D REALLY GOOD…
"The three funiculi contain many fiber tracts. Each fiber tract is composed of axons that have all similar destinations and functions." Citation: Marieb, Elaine N., Patricia Brady Wilhelm, and Jon Mallatt. Human Anatomy. Sixth Edition Media Update. San Francisco: Pearson Education Inc. , 2010. pg. 376.
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Polysaccharides have many functions in living tissue and in food. In living tissue they aid in energy production, energy storage, structure, protection, resistance to dry conditions, etc. In food they help with texture, viscosity, mouthfeel, fiber content, emulsion stability, bulking, yeast food, etc.