The term "enriched" on a label refers to the additional nutrients, considered essential to a balanced diet, which have been added. These include several components of the vitamin B complex: thiamine, riboflavin, niacin, and folic acid. Wheat flour is an excellent source of complex carbohydrates. Other than gluten flour, all types of wheat flour derive at least 80 percent of their calories from carbohydrates. Depending on the flour type, the percent of calories from protein ranges from 9 to 15 percent, except from gluten, which has a 45 percent protein content. Calories from fat are never more than 5 percent. In addition, wheat flour provides from 3 g (cake flour) to 15 g (whole-wheat flour) of dietary fiber per 1-cup serving. Wheat flour contains B vitamins, calcium, folacin, iron, magnesium, phosphorus, potassium zinc and other trace elements, and minimal amounts of sodium.