Vitamin C also is valuable in the absorption of iron, synthesis of connective tissue, and blood formation. The good source of potassium from bananas is helpful for your body to maintain the fluid balance in blood and tissue cells. Potassium is also an essential mineral for protein synthesis and the building of muscle because it stimulates nerve impulses for muscle contraction. Research suggests that a diet high in potassium may reduce the risk of hypertension and stroke. Because bananas are sodium-free and very rich in potassium, they can be eaten as part of a diet to reduce the risk of high blood pressure.
Bananas have no fat, cholesterol or sodium.
Bananas contain more digestible carbohydrates than any other fruit. The advantage is that the body burns off calories from carbohydrates more quickly and easily than calories from protein or fat.