Breakfast cereal (or just cereal) is a food made from processed grains that is often eaten as the first meal of the day. It is often eaten cold with a spoon, usually mixed with milk, yogurt, and sometimes fruit, but may be eaten dry. Some companies promote their products for the health benefits from eating oat-based and high-fiber cereals. In America, cereals are often fortified with vitamins. A significant proportion of cereals are made with high sugar content. Many breakfast cereals are produced via extrusion.