Grinding wheat left byproducts of the stone burrs in the wheat product. This ground the enamel off peoples teeth leaving them nearly toothless by their mid-thirties. It wasn't till recently that "milling" became the norm in flour production. The wheat berry is not crushed in the milling process but is first burst and torn successively into every finer pieces. Some people have never tasted freshly milled flour made into bread. Total pity that...,