Test guide
Ferritin Blood Test
A ferritin blood test measures the level of ferritin in your blood. Ferritin is a protein that binds to iron and stores it in your body. You need iron to make healthy red blood cells. Red blood cells carry oxygen from your lungs to the rest of your body. Iron is also important for healthy muscles, bone marrow, and organs, including brain development in children.
What it is for
A ferritin blood test may be ordered as part of a group of iron tests to help check your iron levels. It can help your health care provider find out if your body is storing the right amount of iron to stay healthy. The test may also be used to: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- serum ferritin, serum ferritin level, ferritin serum
Reviewed products
Curated product links for this test are still under editorial review. Meanwhile, browse the product directory or request a supplier match below.