Test library
Iron Panel Blood Test
Iron Testing measures iron and related proteins in the blood to evaluate anemia, iron deficiency, and iron overload. It is often ordered with a complete blood count for a fuller picture of how the body stores and uses iron.
Order Iron Level Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Iron Level Test- Typical turnaround
- 1-3 business days
- Starting price
- From $25
- Results
- Confidential, online
Quick answer
Iron Testing is a group of blood tests that show how much iron is circulating and how the body stores it. Iron is essential for hemoglobin, the protein in red blood cells that carries oxygen. Low iron can lead to anemia with fatigue and weakness, while excess iron can build up in organs. Testing usually includes several markers that are interpreted together.
What this test measures
Iron is absorbed from food and transported in the blood bound to a protein called transferrin. The body stores surplus iron in ferritin, mainly in the liver. Because iron moves between these compartments, a single measurement gives only part of the picture.
A common iron panel includes serum iron, ferritin, transferrin or total iron-binding capacity, and transferrin saturation. Ferritin is the most widely used marker of stored iron, although it can rise with inflammation. Results are compared with reference ranges and read together with a complete blood count.
Providers order iron testing for fatigue, weakness, pale skin, or shortness of breath, and when monitoring known iron deficiency, chronic illness, or suspected iron overload. Some medications and recent iron supplements can affect results, so sharing that information helps with interpretation. A qualified healthcare provider should evaluate the findings.
- Serum iron
- Ferritin
- Total iron-binding capacity (TIBC)
- Transferrin saturation
- Unsaturated iron-binding capacity (UIBC) when included
- Complete blood count components when ordered together
- Hemoglobin and hematocrit when included
Why people order this test
- Investigate fatigue or weakness that may relate to low iron
- Evaluate anemia found on a complete blood count
- Check iron stores when deficiency is suspected
- Monitor iron levels during treatment
- Screen for iron overload when risk factors are present
- Assess iron status in chronic illness or inflammation
How to prepare
Fasting is often recommended because recent food and iron supplements can affect serum iron. Follow the laboratory's instructions, since many providers ask for a morning sample before any iron supplement is taken that day.
Understanding your results
Results are usually available within one to three business days. Low ferritin generally points to depleted iron stores, while high ferritin can reflect overload or inflammation. A qualified healthcare provider should interpret the panel with the complete blood count and clinical history.
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Frequently Asked Questions
What does iron testing measure?
An iron panel measures the iron circulating in the blood and the proteins that transport and store it, including ferritin and transferrin. Together they show how the body is handling iron.
Do I need to fast for an iron test?
Fasting is often recommended because food and supplements can shift serum iron levels. Follow the instructions provided with the test order.
What is ferritin?
Ferritin is a protein that stores iron inside cells. A ferritin level is the most commonly used indicator of how much iron the body has in reserve.
Can iron levels be too high?
Yes. High iron can occur with hereditary hemochromatosis, liver disease, repeated transfusions, or excessive supplementation. A healthcare provider can determine the cause.
Is an iron test the same as a complete blood count?
No. A complete blood count measures red blood cells and hemoglobin, while an iron panel measures iron and its transport proteins. They are often ordered together.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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