Corn flakes are a packaged cereal product formed from small toasted flakes of corn, usually served cold with milk and sometimes sugar. Benefits of cornflakes to your body: Fat-free food. According to the U.S. Department of Agriculture, a 1-cup serving of dry cornflakes contains 100 calories. €¦ High Iron content. €¦ Protein rich. €¦ Aids weight loss. €¦ A good source of carbohydrates. €¦ Low gluten content. €¦ Good for diabetes. .