Can blood glucose be tested without fasting?

If testing postprandial (after-meal) blood glucose, fasting is generally not required; however, if testing fasting blood glucose, it is usually necessary to be in a fasting state. 1. **Appropriate (can be done):** Blood glucose testing can typically be performed two hours after a meal, and fasting is not required for this test. The measurement should be taken exactly two hours after the first bite of food. A normal value is generally less than 7.8 mmol/L, and this approach usually does not affect the accuracy of the results. 2. **Inappropriate (cannot be done):** If the test specifically requires fasting blood glucose measurement, testing without fasting is generally not acceptable, as it may interfere with the accuracy of the results. Typically, one must abstain from eating for at least 8 hours prior to the test. The normal range for fasting blood glucose is usually between 3.9 mmol/L and 6.1 mmol/L. Testing should be conducted at a qualified medical facility. If abnormal blood glucose levels are detected, it is important to promptly seek medical evaluation and treatment under a doctor's guidance. Additionally, maintaining a balanced diet in daily life is essential.