Why is the PPBS test done two hours after a meal?

The two-hour interval in a PPBS test is crucial because blood sugar levels typically peak about 1-2 hours after eating. This timing allows the test to measure your body’s ability to process glucose and produce insulin effectively. Testing too early or too late may not accurately reflect postprandial glucose metabolism. A two-hour reading provides a standardized and reliable measure to diagnose or monitor conditions like diabetes or impaired glucose tolerance.