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2009 Cengage-Wadsworth

Roles of Fiber in Disease Prevention & Management

Mechanisms

Adsorb bile acids, promote excretion

Increase fecal bulk

Provide fermentable substrates for bacteria in colon

Shortened fecal transit time

Decreases interluminal pH

Fermentation may release fiber-bound calcium

Butyric acid appears to hinder cancer cells

Insoluble fibers bind carcinogens

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