Why Is Whole Wheat Bread Healthy?

White bread, which is made from wheat that has been extensively processed to decrease production cost and increase shelf life, is common in the United States. However, whole wheat bread requires less processing than white bread and includes wheat germ and bran, which are removed from white flour versions. Whole wheat bread may offer several health benefits that white bread does not.

Protein

Whole wheat bread is a richer source of protein than white bread. A slice of whole wheat bread provides about 3.6 g of protein, compared to 1.9 g for a slice of commercially-prepared white bread, according to MayoClinic.com. Protein is a nutrient that provides energy for physical activity and mental alertness. It also aids in the rebuilding of muscle, organ, connective tissue and bone cells.

Dietary Fiber

Dietary fiber serves several important functions that impact your health. It improves digestion, speeding the removal of wastes from your body. It expands in your stomach, helping you feel full between meals and reducing the temptation to overeat. Dietary fiber may also help control cholesterol and blood glucose levels, which may prevent heart disease and diabetes. Whole wheat bread is substantially higher in dietary fiber than white bread -- a slice of white bread contains only 0.6 g of fiber, but a slice of whole wheat bread provides 1.9 g of this nutrient.

Lower Glucose Impact

Whole wheat bread is composed of complex carbohydrates, which your body converts into glucose at a slow, even rate. This helps provide consistent energy for physical and mental tasks. Conversely, white bread is made up of simple carbohydrates, which your body quickly converts into glucose. This can cause rapid blood sugar spikes and crashes that can contribute to diabetes symptoms such as fatigue and lack of mental focus.

Selenium

Selenium is a trace mineral that provides antioxidant benefits. It helps prevent the oxygenation of lipids, which may prevent damage to organ, muscle and bone cells. It may also help prevent the formation and spread or cancer cells. Whole wheat bread is a rich source of selenium -- a slice of whole wheat bread contains about 11.3 micrograms of this mineral, or about 20 percent of the recommended daily intake, according to the USDA National Nutrient Database. Conversely, a slice of white bread contains about 5.2 micrograms.