In conventional wheat processing, the endosperm is the part that is separated in a conventional mill and is milled to very small sizes (approximately 95.0% to a size of less than 150 microns), i.e., it is the main component of the refined wheat flour. The bran is the part that covers the wheat grain and is the part of the wheat in which the fiber, vitamins, and minerals are concentrated. However, bran is generally considered a by-product from the production of refined wheat, and therefore this product is present in bulk and is very difficult to mill. Finally, the germ is the heart of the grain, and in it are concentrated the lipids of the grain, as well as goodly amounts of vitamins and minerals.