What Is a Fasting Blood Glucose Level?
Your fasting blood glucose level is the amount of glucose, or sugar, circulating in your blood after an 8-hour fast. The actual level is determined by a blood test. Abnormal fasting blood glucose levels usually indicate a problem with glucose metabolism, such as hyperglycemia or diabetes. If abnormal levels are detected, further blood testing usually follows an initial fasting blood glucose test to confirm the result.
