Rye is a cereal grain, closely related to wheat. It is mainly grown as a bread grain, Rich in B-vitamins, rye contains generous amounts of iron, calcium, phosphorus and potassium and also has the highest amount of lysine of all grains. As rye is lacking in glutinous proteins, bread made from rye is heavier, denser and usually darker than wheat bread. Lighter bread can be made by blending with a wheat flour