The combination of unique texture and sweet, tart flavor has made Red Grapes an extra-ordinary fruit. Red Grapes are small round or oval berries that feature semi-translucent flesh encased by a smooth skin. Red grapes are relatively low in calories and are fat and cholesterol free. A 1-cup serving of red grapes contains only 104 calories, yet still provides 1 g of protein and 1 g of fiber. However, this serving also contains 27 g of total carbohydrates, 23 g of which come from sugar. Red grapes are a good source of several vitamins. One serving of red grapes offers 16 mg of vitamin C, which is about 27 percent of the daily value, based on a 2,000-calorie diet. It also contains 22 mcg of vitamin K and 0.4 mg of thiamin, which is about 28 percent and 27 percent of the daily value, respectfully. Red grapes also contain small amounts of vitamin E, vitamin A, vitamin K, pantothenic acid, vitamin B-6, folate, beta carotene and alpha carotene. These nutrients help your body processes function properly.