Bob's red mill dark rye flour is 100% stone ground from premium organic u.s. #1 dark, plump rye berries. It contains all the health-giving nutrients of the germ, bran and endosperm. The deep, hearty and distinctive flavor of rye has made it popular throughout history and it remains a staple in eastern european countries and scandinavia, where it can withstand the cold weather conditions better than other grains.