Total Iron Binding Capacity (TIBC) in Serum
This test measures the total amount of iron your body can bind to transferrin, a protein that transports iron in the blood. It helps assess iron status and identify potential deficiencies or excesses.
["TIBC helps evaluate iron metabolism and detect conditions like anemia or iron overload."]
Key facts at a glance
- LOINC
- 61309-1
- Short code
- Sheep Sorrel IgE/IgE total %
- Synonyms
- Sheep Sorrel IgE/IgE total %
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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
What Is TIBC Used For?
TIBC is primarily used to diagnose iron deficiency anemia and ferritin-related disorders. It can also support evaluation of conditions like anemia of chronic disease or hemochromatosis. Your doctor may order this test if you have symptoms like fatigue, weakness, or unexplained anemia.
How Is TIBC Performed?
A blood sample is drawn from a vein in your arm. The serum portion is then tested to measure its capacity to bind iron. The result is expressed in milligrams per deciliter (mg/dL) or micromoles per liter (µmol/L), though exact units may vary by lab.
What Might Affect TIBC Results?
Several factors can influence TIBC levels, including pregnancy, certain medications (like antacids or iron supplements), and chronic illnesses. If you’re taking medications or have health conditions, let your healthcare provider know to avoid misleading results.
Interpreting Your TIBC Result
TIBC alone isn’t typically used to diagnose iron deficiency—it’s often paired with ferritin and serum iron levels. Low TIBC may suggest iron deficiency, while high levels could indicate conditions like anemia of chronic disease or liver disease.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance of TIBC: TIBC is a key part of the iron studies panel, helping identify iron deficiency or overload. Low TIBC often correlates with anemia due to insufficient iron availability, while elevated levels may indicate underlying liver or kidney issues. Your doctor may use these results alongside other tests to guide treatment, such as iron supplements or dietary adjustments.
Short name
TIBC
Frequently asked questions
Why might my doctor order a TIBC test?
What are the typical reference ranges for TIBC?
Can TIBC results change with diet or supplements?
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