Millet is pre-eminent in containing minerals and trace elements. It provides us with three times as much iron as wheat, and is extra-ordinarily rich in fluorine. Physiologists particularly emphasise the abundance of silicic acid and zinc in millet. In no other kind of cereal is there such a high proportion of these substances. This is probably the oldest cereal in the world, and is cooked like rice and can be used in as a paste, in soups or salads.