The reason for this is the following：

1, drinking soup before meals can easily increase satiety and control appetite properly.

2. Drink soup before meals to lubricate the mouth and esophagus, which can prevent dry and hard food from stimulating the digestive tract mucosa, facilitate food dilution and stirring, and promote digestion and absorption.

It is unhealthy to eat soup after meals. Drinking soup after a full meal can easily lead to overnutrition and obesity; The soup after meals will also dilute chyme that has been well mixed with digestive juice, affecting the digestion and absorption of food.