if sugar is important for human body then how diabetes (high and low) is so dangerous disease for humans?

Question

if sugar is important for human body then how diabetes (high and low) is so dangerous disease for humans?

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Answer 1

Sugar needs to get inside cells in order to do the important things. Diabetes is a disease where the cells don’t know they’re supposed to import the sugar, because they either do not have enough “here is sugar” messages (type 1 – not enough insulin) or they don’t listen to the “here is sugar” messages (type 2 – insulin insensitivity).

That’s why the amount of sugar in the blood is used to diagnose diabetes – it can’t do what it needs to in the blood, it needs to get into the cells.

Insulin tells the cells “time to import sugar”.