What is a suitable diet for a 15 year old girl who weighs 13 stone?

Teenager Diet: At 15 yrs, 180 lbs (13 stone) would be obese w a normal height, which is needed to calculate BMI. U should make sure she eliminate access fats and sugars in her diet, trims her serving sizes and limits number of snacks and junk foods, The basic formula is to replace bad food with less calorie more fiber diet. A diary of daily intake of food item over a few days will help her doctor to advise.