Quick Facts
- Sample: Blood
- Fasting: Fasting for 8-10 hours is required
- Turnaround: 3-5 business days. May take longer based on weather, holiday or lab delays.
What This Test Measures
This test measures the amount of proinsulin in your blood. Proinsulin is a building block your body uses to make insulin as it converts the food you eat into energy. Measuring proinsulin, rather than insulin itself, can help evaluate whether your body has a problem making insulin or is resistant to the insulin it produces.
This is a single fasting blood specimen test. The result reflects your proinsulin level at the time of collection and is not a measure of blood glucose, insulin, or long-term glycemic control.
Benefits
- Evaluates whether your body has trouble making insulin
- Helps assess resistance to the insulin you produce
- Requires only a single fasting blood sample
- Supports your healthcare provider's diabetes risk evaluation
- Can help investigate suspected low blood sugar episodes
Who Is This Test For?
- People whose healthcare provider is assessing diabetes risk
- Those ordered additional tests alongside this one by a provider
- People with suspected low blood sugar (confusion, sweating, headache, blurry vision, heart palpitations)
- Individuals who have discussed this screening with their provider and decided it's right for them
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?
Fasting for 8-10 hours is required before this test. Plan your blood draw for the morning so you can complete the fasting window comfortably, and avoid eating or drinking anything except water beforehand.
2. How quickly will I get results?
Results are typically available in 3-5 business days, though weather, holidays, or lab delays may extend this timeframe. You'll be notified as soon as your results are ready to view online.
3. What can my results tell me?
Proinsulin levels can point your healthcare provider toward whether your body is struggling to produce insulin or is resisting the insulin it makes. Elevated levels may indicate a problem with insulin production or a pancreas-related issue worth exploring further. This single measurement doesn't identify the specific cause on its own, and it works best as one piece of information your provider considers alongside your broader health picture.
4. What factors can affect my results?
Not fasting for the full 8-10 hour window can affect the accuracy of your proinsulin level. Since this test requires a single blood draw, timing your appointment correctly matters more than it would for tests collected over multiple points. Speak with your healthcare provider about any other factors specific to your health history that could influence your result.
5. How do I interpret the results?
Interpreting a proinsulin result depends on your fasting status at collection, your symptoms, and your broader clinical picture as assessed by your healthcare provider. A result outside the expected range doesn't by itself identify whether the issue relates to insulin production, insulin resistance, or another cause. Bring your results to your healthcare provider so they can interpret them alongside your medical history and any other testing.
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?
An abnormal proinsulin result is a starting point for a conversation with your healthcare provider, not a conclusion on its own. Your provider can help determine whether additional evaluation or testing makes sense based on your full health picture. Avoid drawing conclusions about a specific diagnosis from this result alone, and don't make changes to any medication without your provider's guidance.
Pre-test preparation
Fasting for 8-10 hours is required before this test. You will give a blood sample at the lab; there is no risk involved in the collection process.
