Lactulose is a synthetic disaccharide used as a drug for the treatment of constipationand hepatic encephalopathy. The prebiotic oligofructose is found naturally in manyfoods, such as wheat, onions, bananas, honey, garlic, and leeks. Oligofructose canalso be isolated from chicory root or synthesized enzymatically from sucrose.Fermentation of oligofructose in the colon results in a large number of physiologiceffects, including:· Increasing the numbers of bifidobacteria in the colon· Increasing calcium absorption· Increasing fecal weight· Shortening gastrointestinal transit time· Possibly, lowering blood lipid levels
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