Serum Ferritin (Mass Concentration)

Why Is This Test Done?

Your healthcare provider may order a ferritin test to check for iron deficiency anemia, chronic diseases like liver disease or inflammatory conditions, or iron overload syndromes. It can also be used in screening for certain genetic disorders or before certain treatments that involve iron administration.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if your blood is drawn early in the morning. Avoid taking iron supplements or certain medications (like vitamin C) for 24 hours before testing, as they can affect results.

What Happens During the Test?

A healthcare professional will draw a small amount of blood from a vein in your arm. The process is quick and typically painless. The blood sample is sent to a lab for analysis.

What Are Possible Results?

Results are reported in micrograms per liter (µg/L). While reference ranges vary by lab, lower than expected levels may indicate iron deficiency, while higher levels could suggest iron overload or other conditions. Your provider will interpret results in the context of your overall health.