Dietary fibres: effects on lipid metabolism and mechanisms of action

Article Abstract:

A review of the nutrition literature shows that there is a growing body of evidence that confirms the idea that lipid metabolism is influenced by the presence of dietary fibers. Specifically, the evidence suggests that soluble, fiber-rich sources such as oat bran, pectins and guar gum significantly lower LDL-cholesterol levels in people with moderately elevated blood lipid levels. While the mechanisms of action by which dietary fibers influence lipid digestion are not yet fully understand, research results suggest that dietary fibers interfere with cholesterol and bile acid metabolism.

Health aspects, Heart diseases, Lipid metabolism, High-fiber diet, High fiber diet

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Role of gastrointestinal motility in the delay of absorption by dietary fiber

Article Abstract:

The fluid viscosity in the stomach and small intestine is enhanced due to viscous soluble fiber, and the luminal volume is expanded because of insoluble, discrete fiber particles. The gastrointestinal motility and so the intraluminal movements affect the glucose absorption. The deceleration in glucose absorption by the dietary fiber is possible through restriction of the intraluminal movements, by raising the resistance of the contents or by lowering the proportion of mixing to propulsive intestinal contractions.

Gastrointestinal system, Gastrointestinal motility

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Short-chain fatty acids and colorectal cancer

Article Abstract:

The connection of dietary fibres and their fermentation products with colorectal cancer has not been researched enough for a definitive conclusion. There is some evidence that unabsorbed carbohydrates and their fermentation products protect against colorectal cancer. Butyrate is one fatty acid which may have some protective effects but needs to be researched more. A diet high in fibre and fermentation products is still advisable.

Research, Colorectal cancer, Fatty acids

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