Cornmeal is a good plant source of protein, high in fiber, and gluten-free. It's a rich source of complex carbohydrates, meaning you feel fuller longer. In addition, it's a good source of vitamin A, which helps the function of the kidneys, lungs, and heart. It's low in fat and calories. When preparing it, avoid adding heavy dairy products such as cream, butter, and cheese that increase the fat and calories and make this otherwise healthy grain unhealthy.