The average calorie content of a banana is about 89 calories, which belongs to the high-calorie tropical fruits, with a large proportion of carbohydrates, and also contains a large amount of fiber, trace elements, and a variety of vitamins. Although the banana belongs to the high-calorie fruit, but on the weight loss is a certain help. Because the sugar contained in bananas is divided into fructose, which is easy to be digested, absorbed and utilized by the body, and will not cause the accumulation of sugar in the body and turn into fat. In addition, bananas contain a large amount of dietary fiber, into the gastrointestinal tract will promote gastrointestinal peristalsis, lock the gastrointestinal tract of water, help the gastrointestinal tract of metabolic wastes out of the body, prevent and relieve constipation, reduce toxins in the gastrointestinal tract of the reabsorption, which will be conducive to the control of weight. However, bananas should not be consumed too much, 1-2 per day is good, to avoid excessive consumption affects the metabolism of sugar in the body.