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Polyphenols in Red Wine Significantly Reduces Heart Disease Risk
"Consumption of grape and grape extracts and/or grape products such as red wine may be beneficial in preventing the development of chronic degenerative diseases such as cardiovascular disease," say Wayne R. Leifert, Ph.D., and Mahinda Y. Abeywardena, Ph.D., of Commonwealth Scientific and Industrial Research Organisation in Adelaide, Australia.
The authors review the accumulating evidence that grape polyphenols work in many different ways to prevent cardiovascular and other "inflammatory-mediated" diseases.
Polyphenols are natural antioxidants found in grapes and some other plant foods.
Their types and actions vary, depending on where in the grape they are found. Grape seeds, grape skin, and grape juice contain several types of polyphenols, including resveratrol, phenolic acids, anthocyanins, and flavonoids.
Through their antioxidant effects, grape polyphenols help to slow or prevent cell damage caused by oxidation.
Polyphenols decrease oxidation of low-density lipoprotein cholesterol ("bad" cholesterol)-a key step in the development of atherosclerosis (hardening of the arteries).
Grape polyphenols also have other protective effects on the heart and blood vessels, including actions to reduce blood clotting, abnormal heart rhythms, and blood vessel narrowing.
It's not yet clear exactly how these benefits of polyphenols occur, although there is evidence of effects on cellular signaling and on the actions of certain genes.
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