Experts remind that eating fruit before meals is not conducive to losing weight. If you want to lose weight, you must control the intake of staple food while ensuring adequate nutrition. You can eat some vegetables such as tomatoes and cucumbers before meals, or drink a bowl of vegetable soup or tomato and egg soup before meals. These foods are low in energy and can make people feel full, so you can't eat too many staple foods for dinner. After a long time, the appetite will gradually decrease. Eating soup after meals is easy to expand the stomach, increase appetite and is not conducive to losing weight. Friends who want to lose weight do not advocate eating fruit before meals, because fruit contains fructose, which is a monosaccharide, and the absorption ratio is faster, which will also increase energy intake and may not achieve the purpose of losing weight. But some fruits should not be eaten on an empty stomach. Tomato: contains a lot of pectin, persimmon gum phenol, soluble astringent and other ingredients, which easily reacts with gastric acid and condenses into insoluble blocks. These lumps will block the pylorus at the gastric outlet, increase the pressure in the stomach, cause acute gastric dilatation, and make people feel bloated and painful. Persimmon: When the stomach is empty, it contains a lot of gastric acid, which is easy to react with persimmon gum phenol, colloid, pectin and soluble astringent contained in persimmon, forming stomach persimmon disease, causing heartburn, nausea, vomiting, bloating, gastric ulcer, even gastric perforation, gastric bleeding and other diseases. Banana: It contains a lot of magnesium. If you eat a lot of bananas on an empty stomach, the magnesium content in your blood will suddenly increase, which will lead to the imbalance of magnesium and calcium in your blood, which will inhibit the cardiovascular system and be harmful to your health. Banana: It contains a lot of magnesium. If you eat a lot of bananas on an empty stomach, the magnesium content in your blood will suddenly increase, which will lead to the imbalance of magnesium and calcium in your blood, which will inhibit the cardiovascular system and be harmful to your health. Orange: It contains a lot of sugar and organic acids. Eating oranges on an empty stomach will stimulate the gastric mucosa, lead to an increase in gastric acid, and make the spleen and stomach stuffy and pantothenic. Black jujube: contains a lot of pectin and tannic acid, which is easy to combine with gastric acid in the human body, leading to a lump in the stomach. Especially don't eat too much before going to bed, and people with chronic gastrointestinal diseases had better not eat. Sugarcane and fresh litchi: The sugar content is very high, so it is not suitable to eat on an empty stomach, otherwise it will stimulate the gastric mucosa and cause stomach pain and fullness of the spleen and stomach. Moreover, if you eat too much sugar cane or fresh litchi on an empty stomach, you will have a "hyperosmotic coma" due to the sudden infiltration of excessive high sugar into your body. Pineapple: It contains quite strong proteolytic enzymes. If you eat before meals, it is easy to cause stomach wall damage. Hawthorn: It tastes sour and has the function of promoting qi circulation and promoting digestion, but if you eat it on an empty stomach, it will not only consume gas, but also enhance hunger and aggravate stomach problems.