A Guide To Understanding The Post Prandial Blood Sugar Test

blood test

Blood sugar levels fluctuate throughout the day and are affected by various factors. These include food consumed, amount of exercise, bouts of illness, level of stress, and sleeping habits. People with diabetes must closely monitor their blood sugar levels, as high blood sugar can lead to diabetic ketoacidosis (DKA). Knowing when your blood sugar is too high or too low and how to treat it is vital for overall health and well-being. There are various tests to find out blood sugar levels. The postprandial blood sugar test is one of the basic tests people with diabetes are recommended to do. Are you curious about the postprandial blood sugar test (PPST) and its requirement? Read on to know more about it.  

This PPST test is recommended for those with diabetes or prediabetes to check their sugar level after eating. This test determines whether a patient’s blood sugar level has climbed above the 120 mg/dl mark. This blog will explore the postprandial blood sugar test, why it is essential, and how to prepare for it. With this guide, you will better understand the postprandial blood sugar test and have a clear idea about how it can help manage your diabetes.

What is the Post Prandial Blood Sugar Test, and why is it essential?

The Post Prandial Blood Sugar Test measures the level of glucose (sugar) in the blood. This test should be taken after eating food because glucose levels increase in the body after meals. The Post Prandial Blood Sugar Test (PPST) is used to screen for diabetes and monitor the effectiveness of diabetes medication. 

Why is this test taken 2 hours after having a meal?

  • When food is eaten, the digestion and absorption of food initiate a biochemical reaction in the body. This reaction affects blood sugar levels. 
  • The average person’s blood sugar spikes about two to three hours after eating and then plateaus for a few hours. 
  • It goes down gradually thereafter until it reaches its minimum point two to three hours later. 

This understanding of your body is essential for diagnosing and managing diabetes because it helps determine how well the body regulates sugar levels. The test can also assess how well a treatment plan works or identify other medical issues like,

  • Insulin resistance, and
  • Pancreatic problems.

Why do I need to take the Post Prandial Blood Sugar Test?

  • The postprandial blood sugar test measures how well your body can regulate your blood sugar levels. 
  • This PPST test is vital in diagnosing and managing diabetes and monitoring how food affects blood sugar levels. 
  • This test can help your doctor determine the right amount of insulin or other medications that help to keep your blood sugar levels in the desired range.

How to prepare for the Post Prandial Blood Sugar Test?

  • Following your doctor’s instructions is the best way to prepare for a postprandial (after-meal) blood sugar test. 
  • Eating a meal containing carbohydrates is best and then waiting two hours before having your blood drawn. 
  • During the two-hour waiting period, drink plenty of water and avoid physical activity. 
  • Your doctor may ask that you avoid certain foods or beverages depending on the specific test. 

How does the PPST work?

  • The PPST takes a small blood sample from an arm vein using a needle-less capillary tube. It is a simple procedure requiring around 5 minutes.  
  • The device then measures the amount of glucose in the sample and sends this information wirelessly to an accompanying receiver unit. 
  • This unit displays the results on a screen, showing how your blood sugar levels change over time. 

Is there any danger involved with using the PPST?

No risk is associated with using the PPST; it is simply a measure of your blood sugar level. Please consult your doctor or healthcare provider beforehand if you have any questions about its use.

Is there any age limit to taking the Post Prandial Blood Sugar Test?

No, there is no age limit for taking a postprandial blood sugar test. It is most commonly used to diagnose diabetes or assess how well diabetes is being managed. 

  • It is recommended that all individuals aged 45 and older get tested for diabetes every three years. 
  • Those with certain risk factors, such as family history, should get tested sooner. 

Although the PPST test has no age limit, it is typically performed on adults rather than children.

Benefits of taking a Post Prandial Blood Sugar Test:

There are several benefits to taking a prandial blood sugar test. These are: 

  • Detects Blood Glucose Levels: A post-prandial blood sugar test can help detect the amount of glucose in the blood. This detection can be an important indicator of diabetes.
  • Helps Diagnose Diabetes: This test can help diagnose diabetes by determining whether the patient’s glucose levels are too high.
  • Establishes Baseline Glucose Levels: A post-prandial blood sugar test can help doctors establish baseline glucose levels which in turn aids the doctors in treatment decisions.
  • Monitors Treatment: This test can also be used to monitor the effectiveness of treatment for diabetes by tracking changes in blood glucose levels over time.
  • Provides Early Detection: The test can detect changes in glucose levels early and help prevent potentially dangerous health complications associated with diabetes.


The post-prandial blood sugar test is essential in understanding how food affects your blood sugar levels. It can help you to manage your diabetes and make lifestyle changes to improve your overall health. With the proper preparation, you can ensure that your post-prandial blood sugar test results are accurate. The post-prandial blood sugar test helps monitor diabetes that ensures you take the necessary steps to stay healthy. 

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