Fasting blood glucose level, specifically before eating anything in the morning must be between 70mg/dl and 99 mg/dl. If it is126mg/dl or higher then it means that person is suffering from diabetes.
It is good to keep the track of glucose levels. While monitoring the levels of glucose in blood it is important to note the pattern of levels of these levels. The person should pay proper attention to different types of medications, foods, stress level or any other activity that cause an undesirable decrease or increase in the level of glucose in the bloodstream.