Postprandial blood glucose test

Postprandial blood glucose is a laboratory test that measures blood glucose level after 2 hours from a meal. Aim of this blood test is to monitor body’s response to the taken glucuose with food.

Blood glucose level increases in a short time after food intake, pancreas secretes insulin hormone as a respond to this increasing so body cells will be able to absorb the glucose from blood circulation with the help of insulin hormone. All these process usually takes 2 hours and blood glucose level decreases to normal range at the end of this period. If person has diabetes or impaired glucose tolerance;  blood glucose level may be found high with postprandial blood glucose test at the end of this 2 hours after the meal.

How the Postprandial Blood Glucose test is done ?

First look at the time and start your eating your meal

After your meal don’t eat,drink or smoke, don’t do exercises or stressful activity because all these can affect to your postprandial blood glucose test result.

After 2 hours from meal a single tube of blood will be drawn from your vein, you may feel a little pain for a minute during blood collection but only for a short time.

Blood glucose level is measured from this blood sample; in normal people blood glucose level must be under 140 mg/dL.

If postprandial blood glucose result is higher than 140 mg/dL this means there is a problem about insulin hormone in your body.

postprandial blood glucose

When the Postprandial  Blood Glucose test is done ?

Your doctor may request you postprandial blood sugar test if you have these symptoms;

  • Frequent urination
  • Abnormal thirst feel
  • Flu vision
  • Tiredness
  • Fatigue
  • Recurrent infections

Your doctor may request some additional laboratory tests to see your condition about diabetes;

  • Fasting blood sugar
  • Hemoglobin A1c
  • OGTT (Oral Glucose Tolerance Test)


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