Herb World News Online · Research Reviews In the first clinical study of its kind, researchers from the University of Wisconsin-Madison found that purple grape juice (Vitis labrusca L., Vitaceae) helps protect heart health in those affected by coronary artery disease (Stein et al., 1999). According to the study, two weeks of grape juice therapy increased vasodilation (relaxed blood vessels) while decreasing harmful oxidation of LDL cholesterol. Impaired vasodilation is thought to be one of the earliest manifestations of heart disease. Previous clinical studies on red wine have produced similar outcomes, leading some researchers to speculate that the alcohol content is the factor that protects against heart disease. The results of the current study provide support for the theory that flavonoids (including quercetin, catechins, myricetin, kaempferol) and tannic acid are the more important constituents in purple grape juice and red wine. It is also likely that white grape juice and white wine provide fewer benefits because they contain mainly juice, without the healthful components from the grape seeds and skins.

Becky's opinion-This is great news since me loves grape juice! : )