Suggestions for a healthy diet include eating all kinds of foods, eating less salt, low fat and oil, and limiting sugar.
The most important thing is to have a balanced diet, eat a variety of foods, and don't eat too single, which will help the body absorb a variety of vitamins.
But eating is important, and reasonable exercise is more important. If you don't exercise, you can't eat well, and your body is more prone to various conditions that affect your physical development.
I hope I can help you.