Interesting article

Please know that Calorie Count cannot and will not support you eating less than 1200 calories a day. We consider this unhealthy and CC is all about HEALTHY weight loss or weight maintenance.
From Mary Hartley, Calorie Count's Director of Nutrition: "By eating only 800 calories, you will not get enough energy, protein, fiber, vitamins, minerals and other components of food. In time, you could become malnourished, which can cause severe health risks such as respiratory infections, kidney failure, blindness, heart attack and even death."
Here is a brief reason why never less than 1200 from the Advice section of Calorie Count Plus, under the Q&A tab:
Why must I eat at least 1,200 calories a day when I want to eat less?
In order to get the daily food servings you need for a balanced diet, it takes about 1200 calories a day. With careful planning, you could have a balanced diet on 1000 calories, but the restrictiveness of a very low calorie level can lead to binging and weight cycling, which will take you further from your weight loss goal. What's more, very low calorie diets can cause excessive muscle breakdown and metabolic adaptations, which can drive down your calorie requirements. In the end, you'll need fewer calories to maintain a higher weight
Your body needs at least 1200 calories per day to survive.
Here is a very rough scientific break down provided by a dietitian for a 5' 2", 19 year old female weighing approximately 100 pounds, sitting around all day and doing nothing:

-The heart needs 12% of the calories (144 cals)
-The kidney needs 12% of the calories (144 cals)
-The Liver needs 23% of the calories (276 cals)
-The brain needs 23% of the calories (276 cals)
-The skeletal muscle needs 30% of the calories (360 cals)
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I have been guilty of  going on a really low calorie diet.  After a few weeks of it I was 10 pounds lighter and miserable. There is no way to be healthy on such a low calorie diet unless you are the size and weight of the example in the article. I want to lose weight to be healthy so I know that my body needs the proper nourishment in order to be healthy. I look back on what all I have put my body through and I am shocked that it is still functioning normally. Live and learn!