The plant pigments that give purple and red grapes their color also contain resveratrol and quercetin, two powerful antioxidants that have been shown to protect cells from free-radical damage. Studies suggest that they may battle heart disease by lowering "bad" cholesterol levels and reducing the risk of blood clots. They have also been linked to nerve and brain health. If you prefer, drink your grapes (in moderation): The same antioxidants are found in red wine and grape juice, such as Concord.
How to Buy and Store
Look for plump grapes that are firmly attached to fresh-looking stems. Imported grapes have high levels of pesticides, so buy organic whenever possible. Refrigerate them in a vented plastic bag or colander, up to one week; rinse just before using.