Red grape
The ingredient in red wine that generates the most excitement is resveratrol, an antioxidant. Researchers first recommended drinking red wine for its resveratrol content, but now believe that table grapes and grape juice are good sources, too. Red wine contains more resveratrol than white wine, due to a longer fermentation process. Grapes, grape juice, and wine have antioxidants that help the cardiovascular system. These antioxidants, sometimes called flavonoids or polyphenols, can relax blood vessels and reduce inflammation. They also reduce the clotting function of platelets much as aspirin does. These antioxidants reside mainly in the skin and seeds of grapes.