Bananas are rich in sugar and fiber, which is beneficial to digestion and laxative. Although you can lose weight, eating bananas on an empty stomach is not good for your health, because there is almost no digestible food in the gastrointestinal tract on an empty stomach. If you eat bananas at this time, it will speed up the movement of gastrointestinal tract, promote blood circulation, increase heart load and easily lead to myocardial infarction.