Glucose tolerance test - non-pregnant

What is a Glucose Tolerance Test?

A glucose tolerance test is a procedure used to assess the body's ability to process sugar (glucose) in the blood. This test is done as part of a physical examination under the supervision of a physician or medical professional. The results of this test can be used to diagnose certain medical conditions such as diabetes.

Preparation for Glucose Tolerance Test

Before a glucose tolerance test, there are some things that you should do to ensure that the results are accurate. Here are some steps you should take prior to the glucose tolerance test:

• Discuss any medications you are taking with your doctor. Certain medications can interfere with the accuracy of the glucose tolerance test.
• Do not eat or drink anything except water eight to 12 hours prior to the test.
• Discontinue any dietary products containing glucose 12 hours prior to the test.
• Keep yourself well hydrated prior to the test.

Types of Glucose Tolerance Tests

Depending on the purpose of the glucose tolerance test, there are two types of tests, both of which use the same basic procedure:

• The first is called a fasting glucose test, which measures the level of sugar in the bloodstream after at least eight hours without eating.
• The second is called an oral glucose tolerance test, which involves drinking a sugary solution and then measuring the level of sugar in the bloodstream after two hours.

What is the Procedure of a Glucose Tolerance Test?

The procedure for the glucose tolerance test is fairly straightforward. First, the patient’s blood glucose level is measured. Then, if needed, they will drink a solution of glucose that contains 75g/litre. After that, the patient’s blood glucose level is measured at intervals of 30, 60, 90 and 120 minutes.

What are the Risks Associated with the Glucose Tolerance Test?

The glucose tolerance test carries some risks, most of which are minor. The most commonly reported side effects are nausea, vomiting and headaches. In very rare cases, the test can cause low blood sugar or hypoglycemia. In these cases, the patient should talk to their doctor right away.

When Should I get a Glucose Tolerance Test?

The glucose tolerance test is typically administered as part of a routine physical examination. It may also be recommended if you have a family history of diabetes, if you are overweight, or if you are experiencing symptoms such as extreme thirst and frequent urination. Your doctor may also recommend the test if you have a history of gestational diabetes.

Why Get a Glucose Tolerance Test?

The glucose tolerance test can help diagnose a range of conditions, including type 1 and type 2 diabetes, insulin resistance, and gestational diabetes. Additionally, it can help identify pre-diabetes, which is a condition where blood sugar levels are higher than normal but not high enough to be classified as type 2 diabetes.