Strictly, no, but it is possible to have the expectation that your body would be burning 1700 calories a day by simply existing (using any online calculator wil

Strictly, no, but it is possible to have the expectation that your body would be burning 1700 calories a day by simply existing (using any online calculator will give you a rough idea of what your "Basal Metabolic Rate", or BMR, should be. But if you have metabolic damage, you may have a lower metabolic rate than expected, meaning that the same 1200 calories a day that should cause you to lose a lb a week is actually just under maintenance calories. Anecdotal, but this happened to me. I lost 100 lbs through diet and just got stuck. Couldn't lose any more to save my life. I ate 300-500 calories under my expected calorie expenditure every day. Then, I got my metabolism tested and found that my BMR was at 300 calories a day under what it should have been, which meant that I was eating maintenance or overeating by 200 calories a day (and I was already feeling starving at that point!) To cut another 300-500 calories out of my diet would have been untenable. I'm still trying to figure out what I can do. Exercise more? Check. Do blood work and make sure everything is in order? Check. Vary my diet or try different diets? Check. I think the only thing left is to try chemicals. Nothing else seems to either raise by base metabolism or decrease my intake needs.