What This Value Measures
Ferritin is the storage protein for iron and shows how well the body's iron reserves are filled. It is the most important value for assessing iron stores.
Elevated Value
An elevated value may indicate full iron stores, but can also indicate inflammation, as ferritin increases during inflammation.
Low Value
A decreased value indicates iron deficiency.
Note: As an inflammation marker, ferritin may be elevated despite iron deficiency.
Reference ranges are typical guide values for adults and vary depending on the laboratory, measurement method, age and sex — always compare with the range stated on your own report. A value outside the range does not automatically mean an illness, and a value within the range does not rule one out. The trend and overall picture are usually more informative than a single value. The doctor's assessment is always decisive.