Boston Globe Online / From the Archives / Health Sense Information

Boston Globe Online / From the Archives / Health Sense

Boston Globe Online / From the Archives / Health Sense

Boston Globe Online / From the Archives / Health Sense

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The resveratrol found in red wines is supposed to be healthful.

Is it also found in raisins

S.O.

Haverhill

A. Resveratrol, a compound found in the skin of some grapes, is considered heart healthy because it cuts cholesterol and inhibits the grouping of platelets that can lead to blood clots, animal experiments have shown.

French scientists have reported that drinking red wine helps lower cholesterol levels, and resveratrol is a major component of several traditional oriental medicines. Earlier this year, scientists also reported that resveratrol is a cancer-fighting agent. (In grapes, it helps the plant resist fungal infections.)

Resveratrol is found in many grapes and grape products. The quantity, though, differs among products, says Dr. Leroy Creasy, a professor of plant science at Cornell University.

Raisins generally don't contain resveratrol. It is destroyed when the raisins are dried in in the sun. Raisins cured indoors have some resveratrol.

Grape juice, it's purple or red, contains resveratrol. Red grape juice is extracted in a heat process that removes color and much of the resveratrol. Creasy's tests showed that homemade juice had the highest levels, possibly because higher quality grapes are used for juicing. White juice, which is cold-pressed, contains very little resveratrol.

Sip for sip, red wine generally contains more resveratrol than grape juice. Some scientists hypothesize that alcohol in wine may help the body absorb resveratrol.

Picking a product to get the most resveratrol is difficult because different varieties of grapes contain different levels of resveratrol, and some grape skins contain none at all, says Creasy. Therefore, wines contain different levels too.

``Pinot Noir has the most, as a rule,'' says Creasy. His advice, if you want more resveratrol in your life and like wine: Drink a variety of red wines. But don't drink too much or you'll offset those health benefits. And if you don't want to drink wine, you can get resveratrol from fresh grapes -- red and white.

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