Ferritin

What the test is

Ferritin can also rise with inflammation, infection, liver disease, and iron overload, so it's read alongside other tests.

Why it's done

• To check for iron deficiency when you have anemia, fatigue, hair loss, or heavy periods
• To check for iron overload (hemochromatosis)
• To follow iron treatment

Getting ready and what happens

• No fasting is usually needed unless it's done with an iron panel.
• Stop iron supplements beforehand only if your provider asks.

How the test is done

• A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.

What the results mean

Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.

Low ferritin

Means low iron stores. Many experts consider a level below about 30 ng/mL a sign of iron deficiency even if it's inside the lab's range. The cause, such as heavy periods or gut bleeding, should be found.

High ferritin

Can come from inflammation, infection, liver disease, heavy drinking, or iron overload. Your provider may check transferrin saturation and liver tests.

Questions to ask your provider

• What do my results mean for me?
• Do I need to repeat this test or have other tests?
• Is my ferritin low enough to need iron?
• What's causing my low iron?
• Should I be checked for hemochromatosis?

Risks

A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.

Related conditions

• Iron-deficiency anemia
• Anemia (low red blood cells)
• Hemochromatosis (iron overload)
• Heavy menstrual bleeding

Related medicines

• Ferrous sulfate (iron)

Related tests

• Iron panel
• Complete blood count (CBC)