When I had my blood test for my physical recently, I had not slept more than a couple of hours for four nights straight (it happens every so often for a few days at at time) and my fasting glucose
had spiked into the pre-diabetic range
with a normal
a1c. I asked my doctor if lack of
sleep can raise FBG but she didn't really give me an answer. She didn't seem concerned since my a1c has not gone up at all and all of my other numbers (lipids, bp, etc.) are "beautiful.