Ferritin Blood Test Test

A ferritin blood test measures the amount of ferritin, a protein that stores iron, in your blood. This test helps show how much iron your body has stored.

What this test measures

Ferritin is a protein that binds to iron and stores it in your body. The test measures the level of ferritin in your blood to check your body's iron stores.

What your results mean

Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.

Higher-than-normal results

Higher than normal ferritin levels can be caused by having too much iron in your body. Other conditions that may cause increased ferritin levels include inflammation (like from infection or surgery), an autoimmune disorder, liver disease, cancer, obesity, alcohol use disorder, and hyperthyroidism.

Lower-than-normal results

Lower than normal ferritin levels may mean you have iron deficiency anemia, or another condition related to low iron levels.

Frequently asked questions

What is a ferritin blood test?

It measures the level of ferritin, a protein that stores iron, in your blood.

Why might I need this test?

To help diagnose or rule out conditions related to iron levels, such as hemochromatosis or iron deficiency anemia, or to monitor chronic conditions that affect iron.

What does a low ferritin level mean?

It may mean you have iron deficiency anemia or another condition related to low iron.

What does a high ferritin level mean?

It can be caused by too much iron in your body, or by conditions like inflammation, liver disease, or cancer.

Can medicines affect ferritin levels?

Yes, certain medicines can decrease or increase your ferritin levels.

Sources

MedlinePlus: Ferritin Blood Test — NIH MedlinePlus

Last updated July 7, 2026. Information is aggregated from official public sources and is not a substitute for professional medical care.