A Balanced Diet

Here are some points a teen should follow to maintain a healthy body:
-Combine Exercise with Eating Well
Have a healthy diet and also workout, exercise, etc.
-Eat a Variety of Foods
Don't eat only one or two food groups because you won't get all your nutrition in that way. Instead, have an open mind of eating starches, meat, vegetables, fruits, and dairy.
-Eat Foods in Moderation
Don't eat too much of one group and not another, limit yourself, especially to unhealthy foods.

Also, here is a good daily balanced diet for teens:
3-5 servings of vegetables
2-4 servings of fruits
6-11 servings of whole grains
3-4 servings of low fat dairy
2-3 servings of meat, poultry, etc.