What is disordered eating?

And does lowing calorie intake to like 1000 each day count as it ?

An eating disorder is a compulsion to eat, or avoid eating, that negatively affects both one's physical and mental health. Eating disorders are all encompassing. They affect every part of the person's life. According to the authors of Surviving an Eating Disorder, feelings about work, school, relationships, day-to-day activities and one's experience of emotional well being are determined by what has or has not been eaten or by a number on a scale. Anorexia nervosa and bulimia nervosa are the most common eating disorders generally recognized by medical classification schemes, with a significant diagnostic overlap between the two. Together, they affect an estimated 5-7% of females in the United States during their lifetimes. There is a third type of eating disorder currently being investigated and defined - Binge Eating Disorder. This is a chronic condition that occurs when an individual consumes huge amounts of food during a brief period of time and feels totally out of control and unable to stop their eating. It can lead to serious health conditions such as morbid obesity, diabetes, hypertension, and cardiovascular disease.

http://en.wikipedia.org/wiki/Eating_disorder

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Information on eating disorders:

http://www.helpguide.org/mental/eating_disorder_help_support.htm

What should a minimum calorie intake be?

As a guide to minimum calorie intake, the American College of Sports Medicine (ACSM) recommends that calorie levels never drop below 1200 calories per day for women or 1800 calories per day for men. Even these calorie levels are quite low.

http://www.bmi-calculator.net/bmr-calculator/harris-benedict-equation/calorie-intake-to-lose-weight.php

 
Average Teenager Weight

http://lifestyle.iloveindia.com/lounge/average-teenager-weight-236.html

Un-healthy obsession with food/body image. Eg. Anorexia, Bulimia, EDNOS, Binge ED, Compulsive Exercise.