You've got bran, which is probably the healthiest part of the bread for us, or the fiber for us because it is just loaded with fiber, for the bran is fiber.
面包糠算得上是面包中最利于我们健康的部分了， 或者说，纤维是最利于我们健康的部分，因为面包糠中富含纤维， 或者说面包糠就是纤维。