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Choose collection locationBiochemistry · Individual laboratory test
Unsaturated Iron Binding Capacity (UIBC)
UIBC means unsaturated iron-binding capacity. It measures how much more iron the blood's transport proteins could carry at the time of collection.
Price for this test on its ownAED 140Test price AED 40
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
- Sample
- Serum
- Laboratory turnaround
- 24 hours
- Collection
- Dubai
- Laboratory
- Intel Lab
Understanding the test
What the Unsaturated Iron Binding Capacity (UIBC) test measures.
Also called Unsaturated Iron Binding Capacity
This measurement helps explain how much of transferrin's iron-carrying capacity remains unused. It often forms part of an investigation of anaemia or suspected overload.
When it may be requested
Available capacity
UIBC helps show how many transferrin binding sites are available to carry more iron.
A possible overload pattern
A small reserve alongside high saturation can prompt further assessment.
Before your sample
Prepare for collection
SpecimenSerum
Your checklist
A fasting morning sample is preferred so that the UIBC and accompanying iron values can be compared under similar conditions. Confirm any iron supplement timing in advance.
A clinician takes a small sample of blood from a vein. The laboratory uses serum, the liquid separated from the blood after it clots.
Smart Report
Understanding your result
24 hoursLaboratory turnaround
Result guideUnsaturated Iron Binding Capacity (UIBC)
Reading your result
More unoccupied sites can occur when little iron is available. Comparing UIBC with circulating iron, total capacity and ferritin is more informative than reading it alone.
What can affect it
- UIBC represents only the unoccupied binding capacity. It cannot replace a measurement of iron stores such as ferritin.
From sample to follow-up
Your testing journey
Laboratory testUnsaturated Iron Binding Capacity (UIBC)
- Specimen
- Serum
- Turnaround
- 24 hours
Open your laboratory report
Look for Unsaturated Iron Binding Capacity (UIBC) in your report. Use the sample type and collection time when comparing it with an earlier report.
Explore Smart Report
Discuss the next step
Look for serum iron, TIBC and saturation on the report. They help show how much of the transport capacity is in use.
Clinical expertise
Your laboratory team
Patient questions
Before you book
How is UIBC different from TIBC?
UIBC refers to the available, unfilled capacity. TIBC includes both occupied and unoccupied capacity. Clinicians interpret the figures with serum iron.
Does a large unused capacity always mean I am iron deficient?
Not always. Pregnancy and oestrogen-containing medication also raise the carrier protein and so raise the reserve. Your doctor reads it with ferritin, saturation and your blood count before drawing any conclusion.
Why does UIBC rise in iron deficiency?
When iron is scarce, two things happen at once: there is less iron to occupy transferrin's binding sites, and the liver makes more transferrin to capture what iron there is. Both leave more sites empty, so the unsaturated capacity goes up. As iron stores are rebuilt with treatment, the free capacity gradually falls back.
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Your next step
Unsaturated Iron Binding Capacity (UIBC) test at home.
Sources & further reading
Written by Dr Nirupama Sabhapathy, Specialist Clinical Pathology. Medically reviewed by Dr Joyce Jose, Specialist Clinical Pathology, on .
Catalogue information and AED price checked on 2 November 2026. Clinical suitability, preparation, collection arrangements and turnaround are confirmed for your selected test.