The writing was washed from parchment or vellum using milk and oat bran. Alternative dilutants are rice bran or rice flour. Postum is made from roasted wheat bran, wheat, and molasses. Phytic acid also occurs in cereals with high bran content. Whole wheat, bran and organic matzo are also available. The zinc chelator phytate, found in seeds and cereal bran, can contribute to zinc malabsorption. Captive waxworms are generally raised on a mixture of cereal grain, bran, and honey. White rice is milled rice that has had its husk, bran, and germ removed. This resulted in a whiter flour that still retained some of the bran and germ. The processing of grains is a process that helps remove the bran and germ. These include bran and flour for multiple food applications. Proper purifying results in maximum semolina yield and the least amount of bran powder. George Washington had a recipe for small beer involving bran, hops, and molasses. However, some research suggests there are levels of inorganic arsenic present in rice bran. Tyrion suggests Bran as King and Sam is the first to agree to Bran's crowning.