Why can’t I calculate 900 calorie day ?

dawniepoodles

my Doctor put me on a 900 calorie per day , low carb low sugar diet, and when I calculate my day it tells me my calories are too low… so it won’t calculate what my weight would be if I eat that way for 5 weeks etc… I think you should allow it…

Alatariel75

It's a liability thing. That's a very low calorie goal, and while some people may be ok doing it under medical supervision, and only under medical supervision, there's a lot more people who will be wanting to do it on their own for super fast weightloss and would be encouraged to unhealthily low calorie intakes by seeing projected weight losses which indicate massive rapid loss. MFP is covering themselves legally by not allowing projections for calorie goals under the recognised, generalised healthy lower limit, and by providing a warning instead.

AnnPT77

Also, don't worry about the 5 week prediction: It's not particularly accurate anyway.

If 900 calories is literally the goal your doctor ordered, it's OK. More often when we see people here eating that little, they aren't under medical monitoring, and have just set themselves a goal that is too extreme and dangerous for their circumstances. Your doctor knows you, which makes a difference.