Glucose Tolerance Test, (75g) (3 Biomarkers)

Blood Test Types

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Glucose Tolerance Test, 3 Specimens (75g)
  • 1 Hour Specimen
  • 2 Hour Specimen
  • Fasting Specimen
Related Lab Test
Doctor/Practitioner
Certain lab tests may come back in the "normal" range. Reference ranges do not always mean "optimal." Patients may still experience symptoms in the "normal" range. It is important to speak with a qualified health practitioner regarding normal vs optimal.
Note
These lab tests can be purchased without a physician and drawn at a Quest Diagnostics location. A small draw fee of $ 8 will be applied at checkout. There are no other "hidden" fees unless noted on the lab test.
Currently, NY, NJ, and RI state laws prohibit direct-access testing. These lab tests cannot be conducted at lab locations within these states at this time.

This test is used for the routine diagnosis of diabetes in children and the non-pregnant adult. 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 the fasting glucose is 126 mg/dL or if the 2-hour specimen is 200 mg/dL. This test has also been used to diagnose insulin resistance or "prediabetes."

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