How long can a normal person go without food without using all there glucose?

Depends: Due to size, weight, gender, activity, your health will deteriorate at diffent rates. Using alll your glucose can = mortality. Get some help if you are starving yourself.

Trick question: The human metabolism is capable of breaking down many tissue types and converting protein from muscle & fat into glucose after the glycogen (primary glucose storage molecule) is depleted. Recall any visual you ever saw on starving prisoners/holocaust victims.An often quoted rule: the average human can survive 3 days without water or 3 weeks without food.