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. Rye is rich in dietary fiber and iron. It is also a nutritious source of antioxidants and nutrients including selenium, phosphorous, magnesium, copper, zinc and protein.