Glucose Tolerance Test, 3 Specimens (75 g) Blood Test
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| Feature |
Labcorp
|
Quest Diagnostics
|
|---|---|---|
| Price | Coming soon | $12.99 |
| Results in | — | ~5 business days |
| Sample type | — | Blood Plasma |
| Require fasting | — | Yes |
About the test
This test is primarily used to diagnose diabetes in children and adults who are not pregnant. For pregnant women, a different test is recommended. To ensure accurate results, patients need to fast overnight and then consume a 75g glucose solution. A fasting blood sample is taken immediately after. For children, the glucose amount is adjusted to their body weight. Diabetes may be diagnosed if fasting glucose levels are ≥126 mg/dL or if glucose levels are ≥200 mg/dL two hours after consuming the glucose.
Who should take this test?
This test is suitable for individuals showing symptoms of diabetes or for routine diabetes screening in non-pregnant adults and children.
What type of sample is required?
Three 1 mL plasma samples are needed for this test, collected in fluoride/oxalate (gray-top) tubes.
Included biomarkers & Reference ranges
| Biomarker | Reference range |
|---|---|
| Fasting Glucose Blood sugar measured after fasting, one of the primary tests used to screen for prediabetes and diabetes. | — |
| Glucose, 1-Hour (after 75 g Oral Glucose) Your blood glucose one hour after a 75 g glucose drink, part of an oral glucose tolerance test used to assess how your body handles sugar. | — |
| Glucose, 2-Hour (after 75 g Oral Glucose) Your blood glucose two hours after a 75 g glucose drink, a key value in the oral glucose tolerance test for diabetes and prediabetes. | — |
Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.
Preparation
- Fasting for 8 hours before your blood draw is required.
- Fasting before a blood draw means you don't eat or drink anything except water.
- Your doctor should provide any special instructions related to fasting for your test. Always follow your doctor's instructions.
How it works
- 1. Order online No referral or insurance
- 2. Get a requisition By email in 24–72 hours
- 3. Visit a draw center Bring a matching photo ID
- 4. Get results Securely by email
- These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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