Americans are urged to eat whole wheat flour. Whole-grain flours are considered more nutritious because they contain more fiber, minerals, vitamins, and other compounds than refined flours. Yet according to USDA, the production of whole wheat flour in the U.S. fell by 3 percent in 2022 from 2021, and has logged five-straight years of dropping output. It is down 21 percent from its peak in 2015. By contrast, the production of refined flour has increased, rising 2.4 percent last year. Whole wheat flour is a small fraction of total flour production, and it is becoming ever smaller.  ...