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Glucose Tolerance Test, 7 Specimens
Quest Diagnostics1 test optionFrom $52.48
Glucose Tolerance Test, 7 Specimens
Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
DetailsGlucose Tolerance Test, 7 Specimens – For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose immediately after a fasting specimen is obtained. (for children, the glucose load is 1.75 g/kg of body weight, up to 75). The diagnosis of diabetes is made if glucose exceeds 200 mg/dL in the 2 hour specimen and in any preceding specimen.
What type of sample is required for this test?Seven – 1 mL plasma specimens collected in fluoride/oxalate (gray-top) tubes
Test ResourcesFor more information, please consult your healthcare provider.
Additional test information
Glucose Tolerance Test, 7 Specimens – For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose immediately after a fasting specimen is obtained. (for children, the glucose load is 1.75 g/kg of body weight, up to 75). The diagnosis of diabetes is made if glucose exceeds 200 mg/dL in the 2 hour specimen and in any preceding specimen.
Collection and processing
- Sample type: Plasma
- Fasting: Yes
- Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Plasma. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: Yes. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should be available in 2 – 5 business days after the sample is collected. Timing can change after collection or if a laboratory requires additional review.
About this test
DetailsGlucose Tolerance Test, 7 Specimens - For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose immediately after a fasting specimen is obtained. (for children, the glucose load is 1.75 g/kg of body weight, up to 75). The diagnosis of diabetes is made if glucose exceeds 200 mg/dL in the 2 hour specimen and in any preceding specimen.
What type of sample is required for this test?Seven - 1 mL plasma specimens collected in fluoride/oxalate (gray-top) tubes
Test ResourcesFor more information, please consult your healthcare provider.
Additional details
Glucose Tolerance Test, 7 Specimens - For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose immediately after a fasting specimen is obtained. (for children, the glucose load is 1.75 g/kg of body weight, up to 75). The diagnosis of diabetes is made if glucose exceeds 200 mg/dL in the 2 hour specimen and in any preceding specimen.
Highlighted health areas
- Metabolic function
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Glucose, Fasting
- Glucose, 2nd specimen
- Glucose, 3rd specimen
- Glucose, 4th specimen
- Glucose, 5th specimen
- Glucose, 6th specimen
- Glucose, 7th specimen