Ryvita Dark Rye Crisp Bread is a good source of fiber and gets its distinctive flavor from whole grain rye, making it a great alternative to wheat crackers. Why is whole grain rye good for you? Diets rich in whole grain foods and other plant foods and low in total fat, saturated fat and cholesterol may reduce the risk of heart disease and certain cancers. Ryvita Dark Rye is bursting with rye flavor. Enjoy the dark, crunchy slices that are fat free and 40 calories per slice.