Rye is a cereal grain that looks like wheat but is longer and more slender and varies in color from yellowish brown to grayish green. It is generally available in its whole or cracked grain form or as flour or flakes that look similar to old-fashioned oats. Because it is difficult to separate the germ and bran from the endosperm of rye, rye flour usually retains a large quantity of nutrients, in contrast to refined wheat flour.
