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INSULIN 2 HOURS AFT 75 GRAM GLUCOSE
A test to assess insulin secretion and glucose metabolism after consuming a glucose solution.
Sample Type
blood
Fasting Required
Yes
Description
This test is designed to measure your body’s insulin response to a glucose load. After fasting, you are given a 75-gram glucose drink, and your insulin levels are measured two hours afterward to see how effectively your body is handling glucose. This is commonly used to diagnose diabetes and insulin resistance.
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How our test process works!
Test Overview:
- Procedure: After fasting overnight (usually 8-12 hours), the patient drinks a solution containing 75 grams of glucose. After 2 hours, a blood sample is taken to measure insulin levels.
- Purpose: To evaluate how the body’s insulin responds to the glucose load and whether there is an abnormal insulin secretion pattern.
Risk Assessment:
- Risk of False Positive/Negative: Various factors (like stress, illness, or recent food intake) can affect results.
- Conditions that may affect results:
- Pregnancy (gestational diabetes)
- Medications (like corticosteroids, diuretics)
- Other conditions (e.g., polycystic ovary syndrome, obesity, metabolic syndrome).
Normal Range for Glucose (for reference):
- Normal:
- Fasting glucose: <100 mg/dL
- 2 hours after glucose load: <140 mg/dL
- Impaired glucose tolerance (prediabetes):
- 2-hour glucose levels between 140–199 mg/dL
- Diabetes:
- 2-hour glucose level ≥200 mg/dL
Interpretation of Results:
- Normal Range:
- Insulin Level: Typically, insulin levels should be low before glucose intake and should peak after glucose is consumed, then decline.
- Normal: Insulin level should return to baseline after 2 hours of consuming 75 grams of glucose.
- Elevated levels could indicate insulin resistance or a tendency toward developing diabetes, though levels can vary based on individual circumstances.
- Normal: Insulin level below 50 µU/mL 2 hours after glucose.
- Insulin resistance/Impaired glucose tolerance: Insulin level greater than 50 µU/mL or higher may suggest insulin resistance or prediabetes.
- Possible Diabetes: Insulin levels significantly elevated or abnormal combined with elevated glucose levels can indicate diabetes.
Sample Type:
- Blood Sample: The test requires a blood sample, typically from a vein (venous blood), taken after 2 hours of glucose intake.
Frequently Asked Question
The Insulin 2 Hours After 75 Gram Glucose Test, also known as the oral glucose tolerance test (OGTT), is used to measure how well your body processes glucose. After drinking a glucose solution containing 75 grams of glucose, your blood insulin levels are tested two hours later to assess your body's insulin response. This test helps evaluate conditions like insulin resistance or type 2 diabetes.
The 2-hour insulin level helps assess how the pancreas is functioning in response to glucose intake. In a healthy individual, insulin levels will rise to help regulate the blood sugar level. If insulin levels are abnormally high or low, it can indicate issues such as insulin resistance or impaired insulin secretion, which are risk factors for diabetes.
If your insulin level is higher than normal two hours after consuming the glucose, it could indicate insulin resistance, where the body's cells are less responsive to insulin. The pancreas compensates by producing more insulin to keep blood glucose levels under control. This is often seen in pre-diabetes or early-stage type 2 diabetes.
A lower-than-normal insulin level after 2 hours might suggest that your pancreas is not producing enough insulin to process the glucose properly. This could be a sign of beta-cell dysfunction or insulin insufficiency, which may be an early indicator of diabetes or an impaired ability to manage blood sugar levels.
Preparation usually includes fasting for 8-12 hours before the test, as this allows for accurate measurements of your baseline insulin levels. It's essential to follow any specific instructions provided by your healthcare provider regarding food, drink, and medications, as some may interfere with the test results.
Normal insulin response: Typically, insulin levels should rise after consuming glucose but return to baseline after a couple of hours.
High insulin levels: Can indicate insulin resistance or prediabetes.
Low insulin levels: May suggest pancreatic beta-cell dysfunction or early signs of diabetes.
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INSULIN 2 HOURS AFT 75 GRAM GLUCOSE
A test to assess insulin secretion and glucose metabolism after consuming a glucose solution.
Offered by other labs
Sample Type
blood
Fasting Required
Yes
Description
This test is designed to measure your body’s insulin response to a glucose load. After fasting, you are given a 75-gram glucose drink, and your insulin levels are measured two hours afterward to see how effectively your body is handling glucose. This is commonly used to diagnose diabetes and insulin resistance.
Covid Safety
Assured
Free Report
Counselling