Fructosamine blood test
Quick answer: A fructosamine test shows your average blood sugar over the past 2 to 3 weeks. Doctors use it when HbA1c may be unreliable, such as with some anaemias, or when they need to see recent changes in sugar control.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
- In fertility careIt can help track recent sugar control in pregnancy, when treatment is changing quickly.
How the test is done
- 1You do not usually need to fast
- 2A needle draws blood from a vein
- 3The lab measures fructosamine
- 4Your doctor compares it with your sugar readings
What your results can mean
Reading your report
Normal ranges differ between labs and by age and sex, so discuss your result with your doctor.
If the result is outside the usual range
A high level can be seen when blood sugar has been raised over the past 2 to 3 weeks. Low blood protein levels can make the result falsely low.
Who usually has this test
People with diabetes whose HbA1c may be unreliable, such as with some anaemias or haemoglobin variants, and pregnant women with diabetes.
Risks and aftercare
There is nothing special to do afterwards.
Names and options
Also called: fructosamine
Listed by the hospital as
- FRUCTOSAMINE, SERUM
Questions about this test
How is fructosamine different from HbA1c?
HbA1c reflects about 2 to 3 months of sugar, while fructosamine reflects about 2 to 3 weeks. Fructosamine can show recent changes sooner.
Why might fructosamine be used in pregnancy?
Sugar control can change quickly in pregnancy, and fructosamine shows shorter-term changes. Your doctor may use it along with home readings.
Can low protein affect fructosamine?
Yes. Fructosamine is mostly sugar attached to albumin, so low albumin can give a falsely low result.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.