Eating a small amount of bananas on an empty stomach will have no effect on your body, but eating a large amount of bananas on an empty stomach may irritate your intestines. 1. Eat a small amount of bananas on an empty stomach: bananas are high in calories (relative to other fruits), which are rich in vitamins and minerals, and are a fruit with rich nutritional value. Each 100 grams of banana contains 89 calories, 22.84 grams of carbohydrates, 1.09 grams of protein, 0.33 grams of fat, and 8.7 grams of vitamin C. Eating a small amount of bananas when fasting can replenish the body’s energy, promote intestinal peristalsis, help laxative, and will not affect the body. 2. Eating a lot of bananas on an empty stomach: If you eat a lot of bananas on an empty stomach, it may stimulate the human intestines and stomach, affecting the normal peristaltic function of the intestines and stomach, and the digestive and absorptive functions of the intestines and stomach are affected. Some people have a bad stomach and poor digestive function, if they eat a lot of bananas on an empty stomach, they may have diarrhea, abdominal pain and other phenomena.