The resveratrol can be extracted from epidermis of grape leaf s and peels of berries. It is the result of response of plants to of fungal infections. It exists in two states of free and glycosidic forms.
And both of them have antioxidant performance. It is an important phytoalexins in grapes. Resveratrol can prevent oxidation of low density lipoprotein. And thus it has the potential effects in anti-cardiovascular disease, anti-cancer, antiviral and immunomodulatory.
The pharmaceutical raw materials suppliers discovered resveratrol in commercial wines in 1992. And at the same year, the scientific community has confirmed the existence of resveratrol in the wine. The researchers further study of resveratrol in wine, to confirm that the composition is present in the grape skins by dipping and fermented into wine. New glycosides of resveratrol with glucose glycosides called spruce is the main ingredient of traditional Chinese medicine polygonum cuspidatum root, spruce new glycosides separation in the intestine as resveratrol. Platelet agglutination in the body can cause thrombosis, such as inhibition of this agglutination can prevent thrombosis. The wine contains resveratrol and salicylic acid and so has the function of inhibition of platelet aggregation, therefore, often drinking wine can prevent thrombosis.
The content of resveratrol in wine to wine, grape varieties, the origin of different, and there is a great difference between its total, red wine, white wine, fortified wine. Found in the content analysis of resveratrol in a variety of plants in different parts of the highest concentrations of resveratrol in grape skin. It is also commonly used grapes to wine, and found that the content of resveratrol in wine is much higher than the content of resveratrol in grapes.
Resveratrol synthesis requires a unique enzyme sharing fabric of this enzyme in the grape berry is not consistent with resveratrol in grape fruits are mainly distributed in the pericarp, followed by seed. The wine resveratrol from grape fruit, peel and seed resveratrol into the wine after the alcoholic fermentation and malic acid - lactic acid fermentation.
Among different varieties of wine, the absolute amounts of resveratrol are different. The resveratrol supplier claims that resveratrol content in grape fruit has a positive correlation and grape varieties to harvest the precarious conditions of the sensitivity of. Although the content of resveratrol in wine to wine, grape varieties, the origin of different, while there is a great difference between its total, red wine, white wine, fortified wine.
In different parts of the wine, the difference of the free white resveratrol content very low levels in the mediterranean wines, while the content is higher in the French Burgundy and Bordeaux wines. In addition to Italy, South America, Spain and Portugal wine inside out, in other parts of the wine are free white resveratrol content than the combination of the state of resveratrol content.
In China, according to the different grape varieties, origin, wines varieties and winemaking, resveratrol content is between 16.7 to 46.3mg / L in the wines. In spite of resveratrol, other ingredients in the wine also play very important roles in human health.Source:http://www.cospcn.com
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