1. Oats: low in sugar, high in nutrition, high in energy and low in calories, suitable for dieters.

2. Corn: rich in nutrition and cellulose, it can improve gastrointestinal peristalsis and has a certain weight loss effect.

3. Purple sweet potato: It is rich in dietary fiber, soft in taste and full, and also contains proanthocyanidins and selenium, which can be eaten in different ways.

4. Potatoes: high in minerals and vitamins, low in calories than other foods such as rice, suitable for dinner. You can eat it by boiling potatoes, making potato cakes or purple mashed potatoes.