Glucose Tolerance Test with Insulin- 2 Hour

This 2 hour Glucose Tolerance Test with Insulin levels is used to assess how an individual processes glucose and how the insulin in the body responds to those glucose levels. This test is typically ordered when an individual may be at risk for diabetes or has had elevated glucose levels previously. There will be multiple blood samples collected for this test. For the Gestational Diabetes test please refer to the Glucose Tolerance-Gestational Diabetes 1 hour test.

Test results may take 1-2 business days.

Available Laboratories: LabCorp, Quest Diagnostics

$329

$525

Glucose Tolerance Test with Insulin- 2 Hour

$525

$329

Test Details

An initial “baseline” draw will be collected while the individual is fasting. Then, you will be given 75 grams of glucose ( drink form), and a new blood sample will be drawn after a 1 hour time frame has passed. A third and final blood sample will be collected after 2 hours of the initial baseline blood draw. This test will require you to stay at the laboratory for the full duration of the test, you are unable to leave and return to the facility. People taking this test should be active and eat a regular diet that includes at least 150 grams of carbohydrate daily for three days prior to the test. Fasting should be observed prior to collection for 8-14 hours. It is advised to discontinue, whenever possible, all nonessential medication that can affect glucose metabolism at least three days before testing. Please consult your doctor regarding any medications and how they may affect this test.

Reviewed By: Dr. Kurt Kloss, MD
Last Reviewed Date: Oct 24, 2019

1. Purchase Tests

Choose the test you want (be sure to pick the laboratory you want to use).

Pay by credit card or PayPal^®.

You pay directly and we do not bill your insurance.

(Note: to preserve lowest possible per test pricing, a single $10.00 lab fee is applied to one or more blood tests. You will not incur any additional charges at the lab.)

2. Visit a Lab

After purchasing your testing you will receive an email with your lab requisition. Bring this form to the laboratory.

NOTE: Be sure to visit the appropriate laboratory!

If you choose LabCorp only visit a Labcorp location.
If you choose Quest Diagnostics only visit a Quest location!

Find Your Lab Location.

No appointment is needed, but making one can minimize your wait time.
Click here for HOURS & APPOINTMENTS

If you have selected the option to have an At Home Test Kit delivered to you, you will receive your test kit in the mail within 5 to 7 business days. (Not all tests are available as At Home Test Kits.)

3. Get Results

We’ll email you when your results are ready. Sign into your account to view and download your result reports.

Certain result values may prompt a phone call from our ordering provider to ensure the patient is aware of their result.

Sample Type

Blood

Prepare For Your Test

Fast for 10 hours. Eat a regular diet that includes carbohydrates for 3 days prior to testing. This test requires multiple blood draws. It also requires that you stay in the testing area for about 2 hours.

Also Known As

No other names specified