Rice is the seed from the grass of the genus Oryza. O. sativa is the species most commonly cultivated for food. Rice is one of the most important cereal grains consumed worldwide. A cup of cooked brown rice provides 88% the Daily Value (DV) of manganese and 20% or more of the DV of magnesium and selenium. It is also a source of multiple minerals and B vitamins and fiber (nutritionadata.self.com).