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Int. J. Mol. Sci. 2010, 11(4), 1365-1402; doi:10.3390/ijms11041365

Impact of Dietary Polyphenols on Carbohydrate Metabolism

1
Department of Clinical Nutrition and Food and Health Research Centre, University of Eastern Finland, P.O. Box 1627, 70210 Kuopio, Finland
2
VTT Technical Research Centre of Finland, P.O. Box 1000, FI-02044 VTT, Finland
*
Author to whom correspondence should be addressed.
Received: 24 February 2010 / Revised: 24 March 1995 / Accepted: 25 March 2010 / Published: 31 March 2010
(This article belongs to the Special Issue Phenolics and Polyphenolics)
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Abstract

Polyphenols, including flavonoids, phenolic acids, proanthocyanidins and resveratrol, are a large and heterogeneous group of phytochemicals in plant-based foods, such as tea, coffee, wine, cocoa, cereal grains, soy, fruits and berries. Growing evidence indicates that various dietary polyphenols may influence carbohydrate metabolism at many levels. In animal models and a limited number of human studies carried out so far, polyphenols and foods or beverages rich in polyphenols have attenuated postprandial glycemic responses and fasting hyperglycemia, and improved acute insulin secretion and insulin sensitivity. The possible mechanisms include inhibition of carbohydrate digestion and glucose absorption in the intestine, stimulation of insulin secretion from the pancreatic b-cells, modulation of glucose release from the liver, activation of insulin receptors and glucose uptake in the insulin-sensitive tissues, and modulation of intracellular signalling pathways and gene expression. The positive effects of polyphenols on glucose homeostasis observed in a large number of in vitro and animal models are supported by epidemiological evidence on polyphenol-rich diets. To confirm the implications of polyphenol consumption for prevention of insulin resistance, metabolic syndrome and eventually type 2 diabetes, human trials with well-defined diets, controlled study designs and clinically relevant end-points together with holistic approaches e.g., systems biology profiling technologies are needed.
Keywords: diet; phytochemical; polyphenols; phenolic compounds; glucose metabolism; insulin sensitivity; glycemic response diet; phytochemical; polyphenols; phenolic compounds; glucose metabolism; insulin sensitivity; glycemic response
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Hanhineva, K.; Törrönen, R.; Bondia-Pons, I.; Pekkinen, J.; Kolehmainen, M.; Mykkänen, H.; Poutanen, K. Impact of Dietary Polyphenols on Carbohydrate Metabolism. Int. J. Mol. Sci. 2010, 11, 1365-1402.

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