Normal level at bedtime (91), up 35 points in morning (145).
by Frances Rose
(Nashville, NC (USA))
QUESTION: Why is my Blood sugar 91 when I go to bed at night and 145 when I get up in morning? Nothing to eat or drink during night.
ANSWER: Hi Frances,
I understand your concern.
Your blood sugar at bedtime is completely normal (91 mg/dL). During the night, you are not eating or drinking anything.
In the morning, you find your blood glucose as high as 145 mg/dL.
Ok, there are 2 main explanations for this:
1. Morning hormones: they include cortisol, growth hormone, chatecholamines. They get higher in early morning. They induce the production and secretion of sugar from liver with high blood glucose as consequence.
In non-diabetic people, this high blood sugar is associated with increased insulin production and secretion to lower it.