What is considered the normal fasting glucose range?

The normal fasting glucose range is recognized as less than 100 mg/dL. This range indicates proper glucose homeostasis and is indicative of normal metabolic function. When fasting glucose levels remain below this threshold, it generally signifies that the body's insulin response and glucose regulation are functioning effectively.

Understanding the context of the other options is important for clarity. A range of 100-125 mg/dL indicates prediabetes, a state where blood glucose levels are higher than normal but not yet high enough to be classified as diabetes. A fasting glucose level of 126 mg/dL and above is diagnostic for diabetes. The range of 80-140 mg/dL includes values that do not accurately reflect the standard thresholds established for normal fasting glucose, as the upper limit exceeds the acceptable range for fasting glucose, which may create confusion regarding metabolic health.