Most grains are not treated to kill bacteria.
Do you find raw cookie dough irresistible? It could be a problem. The flour may contain bacteria--specifically Shiga toxin-producing E. coli O121. Common, light symptoms are diarrhea and abdominal cramps that go away in a week. However, in children under 5, it can cause a type of kidney failure. Be aware that even homemade "play" clay from raw dough could cause an infection. Read the whole U.S. FDA statement.
PositiveTip: For your safety, avoid eating raw dough and wash hands, surfaces and utensils thoroughly after contact with flour.
Refined Fiber White flour is produced by removing bran and germ from whole kernels of wheat. The bran fiber that is removed from wheat is indigestible, but it carries a majority of the vitamins and other micronutrients found in wheat. “Refined” white flour is so nutritionally compromised that “enrichment” is needed to add back selected vitamins and minerals removed in the milling process.