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Ferritin

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

Ferritin is a blood protein that contains iron 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
interpretation: {"text":"Indicates iron deficiency, which may lead to anemia.","label":"Low Ferritin"}; {"text":"Suggests iron overload or inflammation.","label":"High Ferritin"}

Ferritin is a protein found in the blood that stores iron and releases it in a controlled manner when the body needs it. It is an essential biomarker for evaluating iron deficiency or overload.

Low ferritin levels often indicate iron deficiency anemia, while high levels may suggest hemochromatosis, inflammation, or liver disease.

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

Frequently asked questions

What does a low ferritin level mean?
A low ferritin level typically indicates iron deficiency, which can lead to anemia if not addressed.
What causes high ferritin levels?
High ferritin levels can be caused by hemochromatosis, inflammation, liver disease, or certain types of cancer.
  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