During the period of losing weight, you only eat five kinds of food: potatoes, tomatoes, cucumbers, shrimps and apples, and the nutrition can keep up. The reason for this is the following：

1, potatoes are staple food, rich in starch, protein, vitamins and other nutrients.

2. Tomatoes, also known as tomatoes, are rich in nutrients such as vitamin A, vitamin K and carotene.

3. Cucumber is rich in protein, sugar, vitamin B2, vitamin C, vitamin E, carotene, nicotinic acid, calcium, phosphorus, iron and other nutrients.

4. Shrimp is rich in nutrition, containing a lot of protein, astaxanthin and trace elements such as potassium, iodine, magnesium and phosphorus.

5. Apple is a kind of fruit, which is rich in protein, cellulose, carbohydrates, vitamins, trace elements and a little fat. This is a healthy fruit.

To sum up, potatoes, tomatoes, cucumbers, shrimps and apples are rich in starch, protein, vitamins and various trace elements, but little in fat. Therefore, eating only these kinds of foods during weight loss will not only keep up with nutrition, but also prevent you from getting fat.