Black rice is one of several black-colored heirloom plants producing rice variants such as Indonesian Black Rice, forbidden rice, or wild rice. High in nutritional value, forbidden rice is rich in iron. Unlike other black rice from Asia, it is not glutinous or rough. This grain is high in fiber and has a deep, nutty taste. Black forbidden rice is a deep black color and turns deep purple when cooked. Its dark purple color is primarily due to its high anthocyanin content  . It has a relatively high mineral content (including iron) and, like most rice, supplies several important amino acids. In China, noodles made from black rice have recently begun being produced. At least one United States bread company has also begun producing "Chinese Black Rice" bread. It shares the deep tyrian color of cooked black rice.