Eating bananas in moderation at night is generally not fattening, but we should pay attention to moderation, to 1 is appropriate, and should not eat more before bedtime. Because bananas contain fructose, the body metabolism slows down at night when the activity is reduced. If you eat a lot of bananas at night, it will lead to excessive sugar intake will be converted into fat in the body, which will easily cause fat accumulation and risk of gaining weight. Bananas are rich in dietary fiber, which can promote digestion and prevent constipation. Bananas are rich in potassium, which can prevent the increase of blood pressure, resist sodium ion boosting damage to blood vessels, and help relieve edema. In addition, the magnesium in bananas can also loosen muscles and relieve physical fatigue. The vitamins and carotenoids in bananas can improve eyestrain, replenish vitamins and protect the nervous system. However, it should be noted that people suffering from gastrointestinal diseases should not eat bananas on an empty stomach to avoid aggravating gastrointestinal discomfort, acid reflux, diarrhea and other adverse reactions. At the same time, it is recommended to eat ripe bananas and avoid eating bananas that have been placed for too long, because the nutrition will be reduced after the flesh is discolored. And unripe bananas contain tannic acid, which is not conducive to the absorption of other foods in the stomach.