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Ferritin

Published: July 27, 2026Updated: August 25, 2026

Ferritin is a protein that stores iron in the body and is used to assess the body's iron stores.

Quick summary

Ferritin measures the body's iron storage levels.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
ng/mL
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Roche Ferritin, Abbott Ferritin, Siemens Ferritin, Beckman Ferritin
interpretation: {"text":"Indicates iron deficiency, which may lead to anemia and other related symptoms.","label":"Low Ferritin"}; {"text":"May suggest iron overload, inflammation, or liver disease.","label":"High Ferritin"}

Ferritin is a protein found in the cells of the body, primarily in the liver, spleen, and bone marrow. It plays a crucial role in storing and releasing iron in a controlled manner.

Low ferritin levels typically indicate iron deficiency, which can lead to anemia, fatigue, and other health issues. Conversely, high ferritin levels may suggest iron overload, inflammation, or liver disease.

The normal reference range for ferritin is typically between 12–300 ng/mL, but this can vary depending on age, gender, and health status.

Frequently asked questions

What causes low ferritin levels?
Low ferritin levels are commonly caused by iron deficiency due to inadequate dietary intake, blood loss, or malabsorption.
What are the symptoms of high ferritin levels?
Symptoms of high ferritin levels can include fatigue, joint pain, and abdominal pain, often associated with conditions like hemochromatosis.
  1. 1
    Mayo Clinic: Ferritin TestSource
  2. 2
    MedlinePlus: FerritinSource

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.

Medical Disclaimer

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 25, 2026. · Read our editorial policy