hi,
Thank you for writing to Health Care Magic , i understand your concern.
Considering your daughter's age and height , her ideal weight must be around 110-120 pounds. You say obesity and
diabetes do not run in the family, i suggest you to get a
thyroid profile done for your daughter .
Also get routine blood tests done to be on the safer side.
Its not difficult for her to lose weight since she is a teenager and active.
Completely avoid giving her junk food, high calorie food and oily food.
give her a balanced diet with increase servings of fruits and vegetables.
Ask her to drink atleast 4-5 litres of water per day.
Get her involved in some kind of sports in school or some exercises ( running, jogging, cardio) to lose calories.
It wont be too long before she begins to weigh normal if she continues this
diet plan and exercises.
Hope this helps .
Take care .