Quick Facts
- Sample: Blood
- Fasting: Fasting is not typically required. Your blood specimen will be collected 2 hours after a meal. Follow any special fasting or preparation instructions provided by your healthcare provider.
- Turnaround: 2-3 business days. May take longer due to weather, holidays, or lab delays.
What This Test Measures
This test measures your Glucose, Two-Hour Postprandial level, a single blood glucose value drawn exactly 2 hours after you either finish eating a meal or finish a 75-gram glucose beverage ordered by your doctor. Either the meal or the drink must be completed within 15 to 20 minutes so the 2-hour timing stays accurate.
This is a current glucose reading taken at one specific point after eating, not a longer-term glycemic marker and not a multi-specimen glucose tolerance protocol. It reflects how your blood sugar has responded 2 hours after your body processed that meal or drink, based on a single blood draw.
Benefits
- Shows how your blood sugar responds 2 hours after eating
- Supports testing for Type 1, Type 2, and gestational diabetes
- Helps track how well diabetes treatment is managing glucose levels
- Can help identify complications related to diabetes
- Offers a simple, single-draw way to check post-meal glucose
Who Is This Test For?
- People a healthcare provider wants to test or evaluate for Type 1, Type 2, or gestational diabetes
- Individuals already diagnosed with diabetes who need frequent glucose monitoring
- People whose provider is checking whether diabetes treatment is managing glucose effectively
- Individuals at higher risk for diabetes, including those who are obese, who may need more frequent testing
- Anyone wanting a healthy baseline check of how their body manages blood sugar after eating
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. Do I need to fast or prepare for this test?
No fasting is required for this test. You can either eat a normal meal 2 hours before your blood draw or drink a 75-gram glucose beverage ordered by your doctor, with your blood drawn exactly 2 hours after you start eating or drinking.
2. How quickly will I get results?
Results are typically available in 2 to 3 days, though timing can be affected by weather, holidays, or other lab delays.
3. What can my results tell me?
A single postprandial reading shows how your glucose level looks at the 2-hour mark after eating, which can support a provider's evaluation of Type 1, Type 2, or gestational diabetes, help track diabetes treatment, or assist in identifying diabetes-related complications. It reflects one moment in time rather than a full picture of your glucose patterns.
4. What factors can affect my results?
The accuracy of this test depends on timing. Your blood specimen should be collected 2 hours after the start of your meal. Having your blood drawn earlier or later than the recommended 2-hour time may affect your result.
5. How do I interpret the results?
Interpreting a postprandial glucose result depends on your specific value, the timing of your meal or drink, and your broader health picture, including any symptoms, prior diagnoses, or other lab findings. One elevated reading does not by itself confirm diabetes, and one normal reading does not rule it out. Your provider is best positioned to place this result in context with your full history.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
6. What should I do if my results are abnormal?
Share an abnormal result with your healthcare provider so they can review it alongside your symptoms, history, and any other relevant testing. An abnormal result on its own does not confirm a diagnosis or indicate what treatment, if any, is needed, and your provider may recommend further evaluation based on your individual situation.
Pre-test preparation
Fasting is not typically required. Your blood specimen will be collected 2 hours after a meal. Follow any special fasting or preparation instructions provided by your healthcare provider.
