Quick Facts
- Sample: Blood
- Fasting: No special preparation is required
- Turnaround: 1-4 business days (may take longer based on weather, holiday, or lab delays)
What This Test Measures
The Hemoglobin A1c (HbA1c) test measures the amount of glucose attached to hemoglobin, a protein found in your red blood cells. Because red blood cells live for about 3 months, this measurement reflects your average blood sugar level over the past 2 to 3 months, rather than your glucose level at the moment of the blood draw. This makes HbA1c an intermediate-to-longer-term glycemic marker, distinct from a single-point-in-time glucose reading.
This test does not require fasting and can be collected at any time of day, which sets it apart from testing protocols that depend on fasting status or timing around meals. HbA1c is reported as a percentage, and a level below 7% is generally recommended for most people already managing diabetes, though individual targets can vary.
Benefits
- Reflects average blood sugar trends over 2 to 3 months
- Can be collected without fasting, at any time of day
- Helps track changes in blood sugar over time
- Supports ongoing diabetes management alongside your provider
- Offers a convenient alternative to point-in-time glucose testing
Who Is This Test For?
- People with type 1 or type 2 diabetes tracking long-term control
- People with a family history of diabetes
- Individuals who are overweight or obese
- People with high blood pressure or high cholesterol
- Individuals with a history of heart disease or stroke
- People who lead a sedentary lifestyle
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?
No special preparation is required, and you do not need to fast beforehand. It can be collected at any time of day, making it more convenient to schedule than tests that require a specific window around meals.
2. How quickly will I get results?
Results are typically available in 1 to 4 business days. Turnaround may take longer depending on weather, holidays, or other lab delays.
3. What can my results tell me?
Your HbA1c percentage gives a picture of how your blood sugar has trended over the past several months rather than at a single moment. This can help you and your provider spot patterns that might not be obvious from day-to-day glucose fluctuations, supporting ongoing monitoring of blood sugar control over time.
4. What factors can affect my results?
Since this test reflects glucose attached to red blood cells over their roughly 3-month lifespan, anything affecting red blood cell turnover could influence results. Because specific interfering conditions aren't detailed here, discuss any relevant health history with your healthcare provider when reviewing your result.
5. How do I interpret the results?
A target of less than 7% is generally recommended for most people with diabetes, though your individual target may differ based on age, health status, and other factors your provider considers. One HbA1c value on its own does not confirm or rule out diabetes, and interpretation should take into account your broader 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?
Share your results with a qualified healthcare provider, who can help place them in the context of your overall health and history. They can determine whether additional evaluation or testing is appropriate and guide any next steps in managing your care.
Pre-test preparation
No special preparation is required for this test.
