Well, I would like to see my fasting levels in the 3s and 4s, but it ain't ever gonna happen.
Low carbing and exercise don't get mine below 6-7 most of the time, and they can (usually with stress) easily go over 8. I think the highest reading so far this year was 12ish. After a very stressful/disturbed night when I was outside at 3am waving an umbrella at a fox that was trying to kill a cat in my garden. That was a fun experience!
You are pre-diabetic, aren't you?
The thing about FBG is that while we can use drugs and dietary control, and exercise and prayer to our heart's content, we can't actually control it (although some type 1s on insulin seem to do a good job), and our body decides what it wants to do. Things like work and family stress, sleeplessness, job interviews, impending holidays, and so on all have an effect - for some of us. Other people have different reactions (blood pressure, for instance).
So I wouldn't worry about it unless it goes regularly into the diabetic range, in which case pop along to the doc and get yourself tested there.
One of the best things to learn is to only compare yourself with yourself. Because we are all different, and the way this pre D and Ds 1 and 2 affects us will vary hugely.
