I am not someone from Medical field. I am asking this question out of curiosity. My question is about sugar levels in blood, particularly low blood sugar (hypoglycemia).
I can understand the problem with high blood sugar levels (hyperglycemia) as we want sugar to be in the cells so that it can be used in respiration for generating energy.
But I can't quite understand why is hypoglycemia a problem.
Google search indicates that dangerously low levels of hypoglycemia can even cause brain death. Does not hypoglycemia mean that sugar is where it should be i.e. in the cells. When sugar is present there in brain cells instead of being in blood, how can it cause brain death as brain cells have enough fuel to burn for powering them?
Those stores of energy will only get depleted after some time (should last longer if the person in question is not active enough. Only if one does not replenish these depleted stores, this should be a problem (sort of starvation). But replenishment of stores is quite likely to occur in the meantime. Why is hypoglycemia a big problem then (even regarded more serious than hyperglycemia)?
Please enlighten me about this issue. Please forgive me if you found my question silly or naive.