Calories aren't bad for you. Your body needs calories for energy. But eating too many calories, and not burning enough of them off through activity, can lead to weight gain.
Most foods and drinks contain calories. Some foods like green beans are low in calories with only 34 calories per cup, while some foods like pecans have a lot of calories with 200 per ounce. Everyonce and a while you might come across a negative calorie food. Celery would be a good example of this. A negative calorie food is a food where it takes more calories to digest the food than are actually in it. Ice water has the same effect. Unfortunetly eating/drinking these foods will not burn that many calories. We're talking very minor calorie differnce here, 10- 15 calories at most.
It's basic knowledge that eating too many calories will result in weight gain and eating less than the required amount will result in weight loss.
Teen girls will require more calories after they reach puberty, however, they still require less than the guys.
US guidelines for calorie intake for teens
Teenage Girls Age Average Calorie Needs Each Day
11-14 years 2200 calories
Teenage Guys Age Average Calorie Needs Each Day
11-14 years 2500 calories
Now of course everyone is differnt and this may not be the right amount of calories you need. Remember you should always consult a doctor before undergoing any significant changes to you calorie intake!!
If your goal is to lose weight by burning off excess body fat, aim to eat 500 fewer calories per day than your daily caloric needs, and maintain or increase your exercise activity.
Do not go below 1200 calories per day unless you are on a medically supervised weight loss program or after consultation with your doctor
Click on the link below to go to an online calorie counter