Eat Less Move More.
That rubbish went out the window years ago. Yes, ok, I concede: this may produce some short term improvement in body composition. Much the way annorexia will result in fat-loss. However, considering eating disorders - this approach will also lead to catabolism (break down) of essential nutrients such as proteins and fats important for cell structures so that your body can keep moving.
Furthermore and much more simply: if you eat less, eventually you're going to get hungry. And who wants to be hungry? So let's forget that and put that myth to bed once and for all.