Quick Facts
- Sample: Blood
- Fasting: Fasting for at least 8-10 hours is required.
- Turnaround: 1-2 business days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
The Iron and Total Iron-Binding Capacity (TIBC) Blood Test measures iron in your blood and how much iron your blood can bind and transport. Iron is carried by transferrin, a protein made by the liver. Results include four biomarkers: Iron, Total, Iron Binding Capacity (TIBC), UIBC (unsaturated iron-binding capacity), and Iron Saturation.
A standard iron test measures only the total amount of iron in your blood. Adding TIBC shows how much iron can attach to transferrin and other proteins in the blood. This test does not measure other vitamins or minerals, and it does not assess overall nutritional status.
Benefits
- Measures total iron in your blood along with iron-binding capacity.
- Reports TIBC, UIBC, and iron saturation in one test.
- Shows how much iron can attach to transferrin and other blood proteins.
- Gives your healthcare provider information about how iron is bound and transported.
- Helps you discuss possible causes of fatigue or weakness with your provider.
Who Is This Test For?
- People with unexplained fatigue or weakness
- People with pale skin, brittle nails, or shortness of breath
- People with dizziness, lightheadedness, or a rapid or irregular heartbeat
- People with hair loss, restless leg syndrome, or cold hands and feet
- People with chest pain or an inflamed or sore tongue
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this test?
This test measures total iron in your blood and your blood's iron-binding capacity, reported as Iron, Total, TIBC, UIBC, and Iron Saturation. Iron is carried by transferrin, a protein made by the liver, and this test shows how much iron can attach to transferrin and other blood proteins. It measures circulating iron and binding capacity, not dietary intake, and it cannot diagnose a condition on its own.
2. Who should consider this test, and when should I order it?
This test may be helpful if you have symptoms such as unexplained fatigue or weakness, pale skin, brittle nails, shortness of breath, dizziness, lightheadedness, a rapid or irregular heartbeat, hair loss, restless leg syndrome, cold hands and feet, chest pain, or an inflamed or sore tongue. It can be a useful way to look at iron levels and iron transport when you want more information to discuss with your healthcare provider, but many conditions can cause these symptoms, and this test does not replace a medical evaluation.
3. How does this test differ from other nutritional tests?
A standard iron test measures only total iron, while this test also reports TIBC, UIBC, and iron saturation, showing how iron is bound and transported rather than just how much is present. It does not measure other vitamins or minerals, and it is not a complete nutritional assessment. Other blood tests may measure different markers and are not interchangeable with this one.
4. Do I need to fast before this test?
Yes. Fasting for at least 8-10 hours is required.
5. How quickly will I get results?
1-2 business days. This may take longer based on weather, holidays, or lab delays.
6. How do I interpret the results?
Your results show your total iron, TIBC, UIBC, and iron saturation from a blood sample. What they mean depends on your symptoms, medical history, diet, supplements, medications, and other laboratory results, so one result alone does not confirm or rule out a concern. Review the full picture with a qualified healthcare provider.
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.
7. What should I do if my results are abnormal?
Share your results with a qualified healthcare provider, who can review them alongside your symptoms and health history and decide whether any additional evaluation is appropriate. An abnormal result does not diagnose a condition on its own. Avoid making changes to supplements, medications, or your diet unless your provider advises it.
8. How often should I get tested?
How often you test depends on your symptoms, health history, and the guidance of your healthcare provider. This test may be ordered when you want to look at iron levels and iron-binding capacity, with testing frequency directed by your healthcare provider.
Pre- test preparation
Fasting for at least 8-10 hours is required.
