Hi
@simo_M Yes, metformin primarily affects the fasting BG because it reduces how much glucose your liver produces (which is in addition to that from digestion of carbohydrates).
I have been in Low Carb controlled remission for over 2yrs now, yet because of Dawn Phenomenon my FBG is still normally in the 6 to 7 mmol range.
Considering all the injury, stress, lack of sleep, erratic diet etc (all of which tend to raise BG), I see no reason for concern about your FBG levels (yet).