Bananas are relatively high in calories, with 100g of bananas containing about 380J of calories. Consumption can provide the body with a certain amount of calories, and is often used as an alternative to fine carbohydrates by fitness and weight-loss people. Each 100g of banana flesh contains about 20g of carbohydrates, 1.2g of protein and 0.6g of fat, and is also rich in vitamins, minerals, dietary fiber and other nutrients. However, due to the growth environment and other factors, the calories and composition may vary slightly. Generally, the calorie of apple is about 210J/100g, and the calorie of pineapple is about 130J/100g, compared to banana which is a high calorie fruit. However, in general, the calories of bananas and other fruits are insignificant compared with those of fried foods. Because they are rich in fiber and pectin, they can promote gastrointestinal peristalsis and have a certain sense of satiety, so they are suitable for fat loss people to eat in moderation and ensure that the body’s caloric intake is relatively balanced with the caloric consumption, which usually does not turn into extra fat and therefore does not lead to fat, and generally does not affect the weight loss process. If there is a need for weight loss, life should also focus on a balanced diet, but also need to consume an appropriate amount of high-quality protein (such as meat, eggs, milk, etc.), dieting is not recommended to lose weight, need to increase the amount of exercise. In addition, because bananas contain more sugar, they are not recommended for diabetic patients and may affect blood sugar levels. Patients are advised to control the consumption of bananas with a reasonable diet under the guidance of a doctor.