What is the nutritional importance of flour?

Regular white flour turns into glucose when you digest it, thus providing your body with an instant source of energy. This energy gets burned up rather quickly however, and if your looking for something longer acting, try eating complex carbohydrates, rather then simple starches (what white flour is). For a more healthier option, opt for whole wheat flour which takes longer to digest, leaving you with a "full feling" in your stomach. Whole wheat flour also contains a whole array of necessary vitamins and minerals.