Orange Juice is rich in Vitamin C and contains 120% of the recommended daily allowance. Vitamin C is not stored by the body and should be replaced daily. This requirement is easily met by drinking an 8 ounce glass of Orange Juice. An 8 ounce glass has 110 calories. Vitamin C is one of the most powerful antioxidants and acts to neutralize harmful elements know as free radicals to help prevent disease and fight infection. 8 ounces of orange juice also contains: Thiamine 10%, Niacin 4%, Folate 15%, Calcium 2%, Vitamin B6 6%, Magnesium 6%. Also a rich source of potassium, containing 13%, which is important in maintaining fluid and electrolyte balance in cells.