What is the upper limit of the normal range for glucose levels?

The upper limit of the normal range for glucose levels in the fasting state is typically around 6.9 mmol/L. When interpreting blood glucose levels, a value below this threshold is generally indicative of normal glucose metabolism. Values equal to or above 7.0 mmol/L are often used as diagnostic criteria for diabetes.

Understanding the significance of these thresholds is essential for clinical practice, as it helps in identifying individuals who may require further testing or intervention.

The choice of 6.5 mmol/L is just below the upper limit; while it is important to monitor, it is not the threshold that categorizes a patient as prediabetic or diabetic. The choice of 7.5 mmol/L exceeds the typical normal physiological limits and could indicate a state of significantly impaired glucose tolerance or diabetes.