So in the last few months I started (for the first time) checking my fasting blood glucose numbers. They were coming in at pre diabetes range. I am 30 lbs overweight. I quickly started on a low cal/low carb diet only to see my glucose readings increase significantly. Can anyone explain this? I can't imagine I would switch into diabetes in a matter of two weeks. I just don't under stand how they could go up when I am low carbing it and eating the right foods.