Hello, eating bananas at night can't lose weight. Although bananas can produce satiety, have a laxative effect and are good fruits to lose weight, it is unhealthy to lose weight if you only eat bananas at night instead of staple food. Banana sugar is converted into fat, which is more likely to lead to obesity, which will lead to gastrointestinal diseases in the long run. Losing weight should be carried out on the premise of not damaging health. Only through the right diet and reasonable exercise can we really lose weight.