Also if you eat way less than your BMR for a period of time- your weight loss will stall, and you may even end up gaining as your body will think theres a kind of 'famine' going on and hold onto every bit of food that you put into your mouth!
Find out what your body needs, and work out what your body burns (if you're pretty sedentary, multiply your BMR by 1.2 to get a rough idea). If you take 500cals away from your 'burn' figure you'll lose 1lb a week, if you take 1000 cals away from your 'burn' figure, you'll lose 2lb a week- BUT be carefuly not to drop below your BMR figure or you could end up re-gaining all your lost weight?
Thats how most yo-yo dieters usually end up heavier than ever. They drop their cals way too low to begin with, they lose a bunch of weight, get fed-up and give up, then start all over again, but next time around the body is ready for this and will stall even quicker, so they drop the cals even more, still see no progress & give up again- and so on and so on. I know, I've been there.
Surely if you can lose weight by eating as much as possible thats a good thing? Plus it'll be much easier to maintain when you reach goal because you won't have to be 'starving' forever to maintain your weight.