Eating during the Test

Understanding the Fasting Requirement

The Oral Glucose Tolerance Test (OGTT) is used to assess how your body processes glucose. To ensure accurate results, it is important to fast before and while completing the test. Below is what you need to know about the fasting requirement.

What Does Fasting Mean?

Fasting for the OGTT means not eating or drinking anything except water for 8–12 hours before your test. This is done overnight, which the test should be done in the morning.

You may drink plain water during the fasting period, but all other food and drinks should be avoided.

Why Is Fasting Important?

The test measures how your body responds to a controlled amount of glucose. If you eat or drink anything other than water beforehand, it may affect your blood sugar levels and impact the accuracy of the test results.

What Can You Eat or Drink?

During the fasting period:

• Do not eat any food

• Do not drink beverages other than water

Following these instructions helps ensure the test provides reliable results for your healthcare team.

If you have any questions about preparing for the test, please contact our support team for assistance.