The postprandial test is generally undertaken for two hours and it precisely measures the glucose in the blood two hours after eating a meal. The timing for the same begins from the start of the meal.

When should I test my postprandial blood sugar?

A 2-hour postprandial blood sugar test measures blood sugar exactly 2 hours after you start eating a meal. This test is most often done at home when you have diabetes. It can see if you are taking the right amount of insulin with meals.

Should I test my blood sugar 1 or 2 hours after eating?

The American Diabetes Association (ADA) recommends you check your blood sugar levels right before mealtime with a blood sample from a finger stick. Then do it again 1 to 2 hours after that first bite of food.