I'm a volunteer and not a medical professional so please check with your doctor to address any concerns you have regarding your particular condition.
With that said, below is an excerpt from the Virginia Mason clinic website: https://www.virginiamason.org/body.cfm?id=511
which states the norms for blood sugar
"A fasting blood
glucose test. This test is performed after
you have fasted (no food or liquids other than water) for eight hour