Refined flour is used to make plain, white bread.
Unfortunately, fiber is not one of them. When making whole wheat flour, the whole wheat kernels are milled or processed with all the parts intact, except for the inedible husk. Whole wheat flour is used to make whole wheat bread and contains all the nutrients, including the fiber. Here comes the tricky part. Some wheat breads are darkened so that they have that dark, rich-looking color of whole wheat bread.