Posted by: LN | 2009/03/18


High pre-breakfast glucose levels

Dear Doctor

I just want to enquire why my early morning glucose levels (fasting state) are always high (7.7-8.7), but during the day my levels, after meals, are normal (7-8.5).

Should' nt the early morning glucose be lower, considering that no eating takes place during the night.
I am on metformin 500mg twice daily


Expert's Reply


Diabetes expert

It seems as if your early morning glucose levels are still too high. The reason for this may be that your liver is "making glucose" during the night - a simplified explanation for the process of gluconeogenesis and glycogenolysis that is taking place in the liver. Other hormones may also contribute as several hormones are secreted during the early morning hours.
You must discuss your high fasting readings with your doctor as maybe a change to your medication dosage can improve your glucose control.

The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.

user comments


Posted by: Francois | 2009/03/30


Ek sukkel ook met ' dawn phenomenon' . Wat baie help is om nie later as 6uur in die aand te eet nie en dan ook geen vrugte of stysel vir aandete te eet nie. ' n Porsie wit vleis met ' n groot groenteslaai vir aandete en die oggendlessings kom drasties af. Ek gebruik ook chroompolinicotinaat 400 mikrogram 2x dag saam met Metformin 2 x dag/

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