A ferritin test measures the amount of ferritin in your blood. Ferritin is a blood protein
that contains iron. A ferritin test helps your doctor understand how much iron your body
If a ferritin test reveals that your blood ferritin level is lower than normal, it indicates your
body’s iron stores are low and you have iron deficiency. As a result, you could be
If a ferritin test shows higher than normal levels, it could indicate that you have a
condition that causes your body to store too much iron. It could also point to liver
disease, rheumatoid arthritis, other inflammatory conditions or hyperthyroidism. Some
types of cancer also can cause your blood ferritin level to be high.