First of I'm a really big guy. I'm 6'1 and 386 pounds. (yup you read right that was a 3). Short story 3 back surgeries not moving much for two years and still ate the old way. Anyway that puts my BMR at some place close to 3800 calories to maintain my weight. when I eat sweets or have cokes it's easy to drive my calories that high. But now since I have cut all that out it takes everything I have just to be able to eat 1400-2000 calories. So back to the question.....Is a drop of 2000 calories a day safe as long as I'm still taking in 1800 or so calories?