What Is the Difference Between a Ferritin Test and an Iron Test?

A ferritin test measures stored iron, reflecting the body’s long-term iron reserves, while an iron test measures circulating iron in the blood, indicating short-term availability. Ferritin levels provide insights into conditions like chronic anemia or iron overload, whereas iron tests are better for detecting acute changes in iron levels. Both tests are often ordered together for a comprehensive assessment of iron metabolism, helping diagnose conditions like anemia, hemochromatosis, or inflammation-related disorders.