Serum iron test
Fe+2; Ferric ion; Fe++; Ferrous ion; Iron - serum; Anemia - serum iron; Hemochromatosis - serum ironA serum iron test measures how much iron is in your blood.
How the Test is Performed
A blood sample is needed.
Blood sample
Venipuncture is the collection of blood from a vein. It is most often done for laboratory testing.
How to Prepare for the Test
The serum iron level can change, depending on how recently you ingested iron. Your health care provider will likely have you do this test in the morning or after fasting.
Certain medicines may affect the results of this test. Your provider will tell you if you need to stop taking any medicines. Do not stop any medicine before talking to your provider.
Medicines that can affect the test result include:
- Antibiotics
- Birth control pills and estrogens
- Blood pressure medicines
- Cholesterol medicines
- Deferoxamine (removes excess iron from the body)
- Gout medicines
- Testosterone
How the Test will Feel
When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or a slight bruise. This soon goes away.
Why the Test is Performed
Your provider may recommend this test if you have:
- Signs of low iron (iron deficiency)
- Signs of too much iron
-
Anemia caused by a chronic disease
Anemia caused by a chronic disease
Anemia is a condition in which the body does not have enough healthy red blood cells. Red blood cells provide oxygen to body tissues. There are man...
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Normal Results
Normal value range is:
- Iron: Males: 50 to 150 mcg/dL (8.95 to 26.85 micromol/L); Females: 35 to 145 mcg/dL (6.26 to 25.95 micromol/L)
-
Total iron binding capacity (TIBC): Males: 171 to 505 mcg/dL (30.6 to 90.3 micromol/L); Females: 149 to 492 mcg/dL (26.7 to 88.0 micromol/L)
Total iron binding capacity
Total iron binding capacity (TIBC) is a blood test to see if you have too much or too little iron in your blood. Iron moves through the blood attach...
ImageRead Article Now Book Mark Article - Iron saturation: Males: 20% to 50%; Females: 15% to 45%
The numbers above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your provider about the meaning of your specific test results.
What Abnormal Results Mean
Higher-than-normal iron level may be a sign of:
- Too much iron in the body (hemochromatosis)
Hemochromatosis
Hemochromatosis is a condition in which there is too much iron in the body. It is also called iron overload.
ImageRead Article Now Book Mark Article - Anemia due to red blood cells being destroyed too quickly (hemolytic anemia)
Hemolytic anemia
Anemia is a condition in which the body does not have enough healthy red blood cells. Red blood cells provide oxygen to body tissues. Normally, red ...
ImageRead Article Now Book Mark Article - Liver tissue death
- Inflammation of the liver (hepatitis)
Hepatitis
Hepatitis is swelling and inflammation of the liver.
ImageRead Article Now Book Mark Article -
Iron poisoning
Iron poisoning
Iron is a mineral found in many over-the-counter vitamin or mineral supplements. Iron overdose occurs when someone takes more than the normal or rec...
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Lower-than-normal level may be a sign of:
- Long-term digestive tract bleeding
- Heavy menstrual bleeding
- Intestinal conditions that cause poor absorption of iron
- Not enough iron in the diet
- Pregnancy
Risks
There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight, but may include:
- Excessive bleeding
-
Fainting or feeling lightheaded
Fainting
Fainting is a brief loss of consciousness due to a drop in blood flow to the brain. The episode most often lasts less than a couple of minutes and y...
Read Article Now Book Mark Article - Multiple punctures to locate veins
-
Hematoma (blood buildup under the skin)
Hematoma
A bruise is an area of skin discoloration. A bruise occurs when small blood vessels break and leak their contents into the soft tissue beneath the s...
ImageRead Article Now Book Mark Article - Infection (a slight risk any time the skin is broken)
References
Camaschella C. Disorders of iron homeostasis: iron deficiency and overload. In: Hoffman R, Benz EJ, Silberstein LE, et al, eds. Hematology: Basic Principles and Practice. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 37.
Markell M, Siddiqi HA. Vitamins and trace elements. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 27.
Means Jr RT. Approach to the anemias. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 144.
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Blood test - illustration
Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test.
Blood test
illustration
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Blood test - illustration
Blood is drawn from a vein (venipuncture), usually from the inside of the elbow or the back of the hand. A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. Preparation may vary depending on the specific test.
Blood test
illustration
Review Date: 3/31/2024
Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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