Quick Facts
- Sample: Blood
- Fasting: Fasting for 10-12 hours required. Stop biotin consumption at least 72 hours prior to the collection.
- Turnaround: 4-5 business days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
This test measures your insulin response to a regulated dose of glucose, using two separate blood specimens (Insulin Response to Glucose, Specimen 1 and Specimen 2). Rather than reporting a single insulin concentration, it looks at how your insulin levels change after glucose is introduced into your body over an established time span.
This is a response-based measurement, not a direct measurement of blood glucose. It reflects how your pancreas releases insulin in reaction to glucose, which is distinct from a single fasting insulin level or a glucose tolerance test that tracks glucose itself.
Benefits
- Tracks insulin response across two specimens, not just one value
- Offers insight beyond a single fasting insulin measurement
- Supports your healthcare provider's evaluation of insulin function
- Provides objective lab data to discuss with your provider
- Helps identify patterns in how your body responds to glucose
Who Is This Test For?
- Adults whose provider wants to evaluate insulin response to glucose
- People being monitored for conditions related to insulin function
- Individuals working with a provider on glucose or insulin concerns
- Those whose provider is considering insulin resistance or diabetes-related evaluation
- People who need objective, multi-specimen insulin data for their provider
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?
Yes. This test requires fasting for 10-12 hours before your blood draw, and you should stop biotin consumption at least 72 hours prior to the collection.
2. How quickly will I get results?
Results are typically available in 4-5 days, though weather, holidays, or lab delays may extend this timeframe.
3. What can my results tell me?
Comparing your two insulin specimens shows how your insulin levels respond to a glucose dose rather than reflecting a single point-in-time value. This response pattern gives your provider a window into how your body handles glucose exposure, distinct from what a single glucose or fasting insulin result would show on its own.
4. What factors can affect my results?
Not fasting for the full 10-12 hours before your draw can affect accuracy, as can biotin supplements taken within 72 hours of collection. Because this test relies on two specimens collected in relation to a glucose dose, consistency in following the stated preparation instructions matters for a reliable comparison between the two results.
5. How do I interpret the results?
Interpreting insulin response results depends on comparing both specimens together, alongside your fasting status, medical history, and any other findings your provider is considering. A single elevated or low value between the two specimens does not, on its own, confirm or rule out a specific condition. Your healthcare provider is best positioned to place these results in the context of your overall health picture.
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?
Bring your results to a qualified healthcare provider for review. They can determine whether additional evaluation or testing is appropriate based on your full health history, and they are best equipped to explain what your specific results may mean for you.
Pre-test preparation
Fasting for 10-12 hours is required before your blood draw. Stop biotin consumption at least 72 hours prior to the collection.
