That said, whole grain wheat is naturally high in iron, magnesium, folic acid, and other nutrients. If we would just use the whole grain (the bran, the germ, and the endosperm) rather than just the starchy endosperm, we would gain all of those nutrients without the need to enrich them.
I bake a lot of sourdough bread, always with some percent of 100% extraction (non-sifted) stone-ground whole wheat flour. We all should be eating far more whole grains.
Note: "whole wheat" products you see in the grocery store are often not produced by traditional 100% extraction whole grains. They often use roller mills to mill just the endosperm, and then add back in a certain portion of finely ground bran to give it color + flavor...but it's certainly not true whole grain.