Dear Mariaan Reid
Glucose in the blood comes from 2 sources. The first is what one eats and the second is from the liver. In diabetes the liver makes too much glucose and it is insulin that helps control it. When it comes to infections , then there are stress hormones like cortisol and adrenaline that tell the liver to make even more glucose, which is why the levels go up even if a patient is not eating more.
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