Is a Postprandial Blood Sugar Level of 8.7 Normal?

When evaluating blood glucose levels, the standard measurement is typically based on venous blood. Therefore, whether a blood sugar level of 8.7 mmol/L two hours after eating is considered normal depends on whether it was measured using venous blood. The normal postprandial (after meal) venous blood glucose level should be below 7.8 mmol/L. A reading of 8.7 mmol/L is higher than the recommended threshold and falls into the impaired glucose tolerance range, though it does not yet meet the diagnostic criteria for diabetes, which is defined as a postprandial venous glucose level of 11.1 mmol/L or higher.

Factors That Influence Blood Sugar Readings

When interpreting blood glucose results, it's important to consider the context in which the test was performed. Stress, illness, or recent physical activity can temporarily elevate blood sugar levels. For an accurate assessment of glucose metabolism, individuals should ideally be in a stable and rested state without any acute illness or infection. If the person was in good health at the time of testing, a result of 8.7 mmol/L would be classified as abnormal and warrants further investigation.

Confirming the Diagnosis

It's also important to clarify whether the measurement was taken using venous blood or a finger-prick (capillary) blood sample. Capillary readings can sometimes differ from venous values. If the test was performed using a home glucose meter, it is advisable to confirm the result with a laboratory-based venous blood test. An oral glucose tolerance test (OGTT) may also be recommended to more accurately assess how the body processes sugar over time.

Next Steps

In summary, a postprandial blood glucose level of 8.7 mmol/L is considered elevated and may indicate impaired glucose tolerance. This condition can be a precursor to type 2 diabetes and should not be ignored. It is strongly recommended to consult a healthcare provider for a comprehensive evaluation, including additional blood tests and lifestyle assessment, to determine the underlying cause and implement appropriate management strategies.