Ever wondered why you should eat a banana? Here is Why.. Quick energy source : Bananas consist mainly of sugars (glucose, fructose and sucrose) and fiber, which makes them ideal for an immediate and slightly prolonged source of energy. Rich source of potassium and fiber : An average banana contains about 450 - 470 mg of potassium. Thus it is effective in lowering blood pressure and reduces the risk of stroke. Also bananas being a rich source of fibers helps prevent heart diseases. Antacid properties : Bananas have long been recognized for their antacid effects. This helps to protect against stomach ulcers and ulcer damage. Source of Pectin : Bananas contain Pectin, a water soluble fiber that helps normalize movement through the digestive tract, improves digestion and eases constipation. Rich in vitamins : Bananas are a rich source of vitamin C, Vitamin B6 & B12. It improves the functioning of the nervous systems. Iron content : ...