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Fructosamine (Serum)

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of fructosamine in your blood, which reflects your average blood sugar control over the past two to three weeks.

Quick summary

["Fructosamine helps track long-term glucose levels, useful for managing diabetes."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
38928-8
Short code
FAH gene Mut Anl Bld/T
Synonyms
FAH gene Mut Anl Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have diabetes or prediabetes to monitor how well your blood sugar is being controlled over time. It can also be used to assess treatment effectiveness or detect complications related to prolonged high blood sugar.

What Does a Result Mean?

Fructosamine levels can indicate whether your blood sugar has been consistently high or low. While specific ranges aren’t always provided, higher levels may suggest poor glycemic control, while lower levels might indicate recent changes in diet, medication, or stress.

How Is This Test Performed?

A blood sample is taken from a vein in your arm, usually in a clinic or lab setting. The sample is then analyzed to measure fructosamine levels using an immunoassay method.

What Are Common Causes of Abnormal Results?

Fructosamine levels can be affected by factors like recent changes in diet, stress, illness, or certain medications. High levels may also occur in conditions causing chronic hyperglycemia, while low levels might be due to acute hypoglycemia or temporary factors.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fructosamine Level

Frequently asked questions

What does a fructosamine test measure?
This test measures the amount of fructosamine in your blood, which is a protein that binds to blood sugar (glucose) and reflects your average blood sugar levels over the past two to three weeks.
How often should I get this test?
Your healthcare provider will determine the frequency based on your diabetes management needs. Typically, it may be done alongside other tests like HbA1c, but check with your provider for personalized guidance.
Can diet or exercise affect fructosamine levels?
Yes, short-term changes in diet, exercise, or stress can influence fructosamine levels. However, it primarily reflects long-term trends, so significant fluctuations may take time to show up in results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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