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High Fasting Bg Level Even After Fasting

The accuracy of most brands of meters and strips is around +/- 15%. You may well have been within target.
Obviously this won't work for you because you're fasting but I found that having a small snack before bed stopped the morning higher readings.
 
I have had a few pleasingly lower rates but though they would be really low after the longer fast and the exercise.

Is it possible that this is gluconeogenesis coming into play? Often diabetics can't fast for that very reason. Fasting is fine for some, not for others. Exercise will also raise BG in some diabetics.
 


Please google gluconeogenesis. This is probably why you are getting high BS even after fasting. Some diabetics just aren't cut out for fasting.
 

Just google gluconeogenesis, it's a recognised phenomenon, and there will be lots of scientific papers regarding it.
 
If you're on metformin, you need to be careful of hypos


Not so much with metformin, since it's function does not directly lower blood glucose. Metformin works by helping to improve insulin resistance. It can also help with high morning fasting glucose. The other diabetes drugs are far more likely to cause a hypo than metformin.
 
Please google gluconeogenesis. This is probably why you are getting high BS even after fasting. Some diabetics just aren't cut out for fasting.

The results were not "high" they were just a little higher than the results I had seen the week before, which were in the normal range - I will google your suggestion, though, and find out more about that. The week before when I started intermittent fasting with fasts of between 18 and 29 hours, my BG got lower every day and I was producing ketones according to my rather crude testing method (a cheap breathalyser detecting breath acetone) and a friend's nose, who could smell it on my breath.
 
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Good luck! Sometimes it takes a while for BS to come down to what we expect.
 
I think 'The Diabetes Code' by Jason Fung explains it quite well.
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