2. Fish and chicken are low in fat and high in protein. It is not easy to gain weight after eating.

3. Eggs and milk are foods with high content in protein. Eating these foods can provide enough nutrition for the body.

4, crude fiber foods, such as yam, sweet potato. They have a strong feeling of fullness and low carbohydrate content, so they are not easy to gain weight, and they can also bring a strong feeling of fullness and reduce extra food intake.