My 16 y.o. daughter wants to lose weight. She weighs 130-135 lbs and I think that it is not necessary for her. What do you think?

oh, I believe that she should just eat less and to have more activity.

If you are 16 years old, heck you can lose weight faster than a 29 year old adult, I mean, you only need a balanced diet and above all a little movement if you need more you can find more information here about diets I assure you that you will have the body that you clearly want not in a week or a month but in less than a year you will have what you want to look good.