How many pounds would a 13 year old who is 5'3 and weighs 99 pounds lose if she became anorexic?

Hi, For weight what is take in consideration is the height and the build; meaning some people have small build(small back...) it is like thinner bones or a medium or large build (wider bone structure) these are factors that play a big role in the average range that says how much you should weight. Saying this is the person is 5'3 and 99 pounds by standars is already below the weight. For this height usually the ideal weight is between 105 and 115; though 99 it is not that below still healthy ; but if the person losses weight and go from 99 to 90 in a very short time ; there is a problem. To say that the person is anorexic , you have to observe eating behaviors. Changes. If this person after eating is going to the bathroom everytime then it can be bulimia with anorexia ; very common in our youth this days because of the society's standards and pressures obssess with physical non healthy size00 appearance. If you suspect something like this please contact a Doctor , Parents, Teacher, or school nurse; This is serious and many teenagers died every year because we let go.