What is white flour? It is from the same wheat plant as whole wheat, but the grain has been bleached and the outer hull, or shell of the grain has been removed. The outer shell is hard and protects the soft inner layer that we eat. However it contains most of the nutrients and the food value in the grain.
In early civilizations, everyone ate “whole” wheat. But now, refined wheat is thought to be a sign of the advancement of our civilization and whole wheat is considered crude or primitive.