A 2-hour postprandial blood sugar test measures blood glucose levels exactly 2 hours after eating a meal. This is not a test used to diagnose diabetes.
Attention! If your physician has ordered any other test, fasting may be required before the start of the 2-hour postprandial test.
- Eat a meal that contains carbohydrates.
- Eat the entire meal within 15 minutes.
- You should rest during the 2 hours between the meal (or drink) and the blood collection.
- Do not smoke, eat, drink, or exercise during the 2 hours. These activities cause the blood sugar levels to be falsely low or falsely high.
- Return to the laboratory two hours after completion of your meal. Your blood will then be drawn for the 2 hour postprandial blood sugar (glucose).
After Your Blood Collection
- The person drawing blood from your vein will place a piece of gauze on the area where your blood was drawn. She/he may ask you to hold the gauze firmly until the bleeding has stopped.
- A bandage will be placed over the gauze where your blood was drawn.
- Do not remove the bandage for at least 15 minutes.
- Avoid bending your arm or carrying heavy objects for about 1 hour.
- Slight soreness may occur with some patients.