The average calorie content of a banana is about 89 calories, which is a high-calorie tropical fruit with a large proportion of carbohydrates, and also contains a lot of fiber, trace elements and many vitamins. Although bananas are a high-calorie fruit, they are useful for weight loss. 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, which will promote gastrointestinal peristalsis after entering the gastrointestinal tract, lock the water in the gastrointestinal tract, help the metabolic waste in the gastrointestinal tract to be discharged smoothly, prevent and relieve constipation, reduce the reabsorption of toxins in the gastrointestinal tract, thus contributing to weight control. 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.