When drinking soup, we should pay attention to the saying that "drinking soup before meals makes you slim and healthy" and "drinking soup after meals makes you fatter", which has certain scientific reasons. Drinking soup before eating is equivalent to adding some "lubricants" to the upper digestive tract to make the food swallow smoothly. Drinking soup from time to time during meals is conducive to the dilution and stirring of food, and is conducive to the absorption and digestion of food in the gastrointestinal tract. At the same time, drinking soup before eating can partially fill the stomach, which can reduce the inclusion of staple food and avoid excessive calorie intake. And eating soup after meals can easily lead to overnutrition and obesity. There is a big difference between drinking before meals and after meals: the time of drinking soup is very particular, as the saying goes, "drinking soup before meals is slim and healthy;" It makes sense to drink soup after meals. The more you drink, the fatter you get. Drink a few mouthfuls of soup before meals to lubricate the mouth and esophagus, which can prevent dry and hard food from stimulating the digestive tract mucosa, which is beneficial to food dilution and stirring and promote digestion and absorption. Most importantly, drinking soup before meals can make the food in the stomach fully close to the stomach wall, enhance the feeling of fullness, thus inhibiting the feeding center and reducing people's appetite. Studies have shown that drinking a bowl of soup before meals can make people absorb less 100- 190 kcal. On the contrary, it is unhealthy to eat soup after meals. On the one hand, when the meal is full, drinking soup can easily lead to overnutrition and obesity; In addition, the last soup will dilute the chyme that has been mixed with digestive juice, which will affect the digestion and absorption of food. In addition, eating soup at noon is not easy to gain weight. Some experts pointed out that "eating soup at lunch absorbs the least calories". Therefore, in order to prevent from gaining weight, you might as well have soup at noon. It is not advisable to drink too much soup for dinner, otherwise the quickly absorbed nutrients will accumulate in the body, which will easily lead to weight gain. It is best to choose low-fat food for soup: in order to prevent soup from getting fat, try to use less high-fat and high-calorie foods, such as old hens and fat ducks. Even as a soup, it is best to skim off the excess oil when stewing. Lean meat, fresh fish, shrimp, skinless chicken or duck, rabbit meat, wax gourd, loofah, radish, konjac, tomato, seaweed, kelp, mung bean sprouts, etc. They are all good low-fat soups, so choose more. The slower you eat soup, the less likely you are to get fat: American nutritionists point out that if you extend the time of eating, you can fully enjoy the taste of food and feel full in advance. So is soup. Eating soup slowly will leave enough time for the digestion and absorption of food. When you feel full, you will eat just right. And eat soup quickly. When you realize that you are full, you may have eaten more food than you need.

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