Cereal products are made from processing cereal grains and include various breads, pasta, flour, and other preparations. The main cereal grains used are wheat, rice, corn, rye, barley, oats, millet, sorghum and buckwheat. Cereal products provide carbohydrates, vitamins, proteins, minerals, and fiber. The document then provides details on specific cereal grains like wheat, maize, rice, oat, rye, and barley and how they are used to make different food products.