I agree with others- an MD doesn't mean he's infallible. Also, no exercise while you're restricting your eating like that. Maybe try some yoga or a little strength training, but nothing aggressive and NO cardio.
For food tips, go to this link. There's a meal plan for a cleanse that you can do for about 700 calories. It's relatively well balanced with carbs, veggies, fats and protein. I advise trying one meal with fish and one with chicken (if you eat meat). fitbie.msn.com/look-better-naked-2-day-cle