Is eating 1200 calorie to lose weight healthy?

It depends... This depends on your size, activity level and the type of calories (low-glycemic foods help the most). Most people will lost weight on a 1200 calorie diet but weight loss on such a diet will be temporary unless you make long-term changes in your diet. You are more likely to become deficient in vitamins and minerals so should take a multivitamin. Please see http://bit.Ly/19csbtw and my comment:.