Usually, though not always, this has a pleasant effect. Your body canât store alcohol, so it breaks it down - your liver's job. The liver firstly changes alcohol into acetaldehyde (this is toxic), then into acetate (harmless), which is finally broken down into carbon dioxide and water.
Each one-cup serving of grapes contains 62 calories, 0.6 grams of protein, 0.3 grams of fat and 15.8 grams of carbohydrate, including 0.8 grams of fiber. (See Reference 1) This is about three percent of the daily 25-gram value for fiber for people who eat a 2,000-calorie diet.
Grape juice is a good source of vitamins B-6, C and thiamin, as well as the minerals manganese and potassium. Its primary benefit, however, comes from polyphenol flavonoids, which are antioxidants that fight harmful free radicals in your body that can damage cells and cause disease.