The following was from an article talking about cutting too many calories.....fad dieting. You can't cut so many your body goes into starvation mode and stores fat to preserve you! Just do it reasonable! You will lose better and have more chance for it to stay off.

I knew someone that would cut to 400 calories a day before a special meeting. She put her body into a diet distress and always struggled so hard to get weight off and keep it off.

Let's do it right! Let's do it healthty!! Let's do it!!

• Coming to Terms With Calories
  Remember that calories are not your enemy. They are a vital part of a healthy and energetic life. "Your body needs a certain amount of calories just to sustain proper function," says Lummus. This is why fad diets that force you to cut out too many calories leave you feeling lethargic, shaky, and ready to give up.
  Instead of opting for a fad diet, find a reasonable eating and exercise plan that allows you to lose one-half to two pounds per week. There is evidence that people who lose weight at this rate — by making better nutrition choices, eating smaller portion sizes, and exercising — also have the best chance of keeping it off. Make a plan to adopt new healthful habits that you will be able to stick to indefinitely, and always allow yourself a little wiggle room for special occasions.