Gluco20 Reviews On an empty belly, blood sugar ranges ought to be between 70 and 100mg/dL for a non-diabetic. However, you continue to now not considered a diabetic till blood sugar ranges following an overnight fasting are above 126mg/dL. Let's say that your blood sugar degree on an empty stomach or after an overnight fast is round 115mg/dL. You may assume which you have diabetes - on the grounds that it's far above the excessive variety or "everyday" - however you do not.