Fructosamine (Serum)
This test measures the total amount of fructoseamine in your blood, which reflects your average blood sugar levels over the past two to three weeks. It helps assess how well your blood sugar has been controlled over time, especially in people with diabetes.
["Helps track long-term blood sugar control without needing a blood draw for hemoglobin A1c."]
Key facts at a glance
- LOINC
- 112129-2
- Short code
- D farinae IgE Qn IA
- Synonyms
- D farinae IgE Qn IA
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ia
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your healthcare provider may order a fructosamine test if you have diabetes or prediabetes and want to monitor how consistently your blood sugar has been within target ranges. It’s particularly useful when hemoglobin A1c results are unavailable or unreliable (e.g., due to recent blood loss, hemolysis, or certain medical conditions).
What to Expect During the Test
A small blood sample is taken from a vein, usually in your arm. The process is quick and typically done in a clinic or lab. You may feel a slight pinch, but it usually doesn’t cause discomfort. No special preparation is needed, though you may be asked to fast if your test is part of a broader metabolic panel.
How the Test Results Are Interpreted
Fructosamine levels are not typically reported with a specific range in every case, as they vary based on factors like age, sex, and overall health. Your healthcare provider will compare your result to your baseline or previous results to determine if your blood sugar management needs adjustment. Higher levels may indicate poor control of blood sugar over time.
Potential Causes of Abnormal Results
Elevated fructosamine levels might suggest consistently high blood sugar, possibly due to uncontrolled diabetes or other conditions affecting blood sugar regulation. Lower levels could indicate consistently low blood sugar or certain medications that lower blood sugar. Always discuss any changes in your results with your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Fructosamine Level
Frequently asked questions
Fructosamine is a useful tool for monitoring diabetes management because it provides a snapshot of blood sugar trends over weeks rather than months (unlike hemoglobin A1c). It’s especially helpful for patients who can’t have an A1c test or when immediate feedback is needed to adjust treatment plans.
Yes, you can eat and drink normally before this test unless instructed otherwise. Unlike some tests, fasting isn’t required for fructosamine.
No, fructosamine is not the same as hemoglobin A1c. While both measure blood sugar control, fructosamine reflects recent trends (weeks) and is measured directly in serum, whereas A1c reflects longer-term trends (months) and is derived from red blood cells.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy