Introduction: One of the most prevalent disorders of man is the dietary deficiency of iron and the resulting anemia. Therefore, the assays of iron, total iron binding capacity, and other assessments of iron compounds in the body are clinically significant. Iron-storage compounds in the body include hemoglobin, hemosiderin, myoglobulin, and the cytochromes. In most tissues, ferritin is a major iron-storage protein. The measurement of ferritin in serum is useful in determining changes in body iron storage, and is noninvasive with relatively little patient discomfort. Serum ferritin levels can be measured routinely and are particularly useful in the early detection of iron-deficiency anemia in apparently healthy people. Serum ferritin measurements are also clinically significant in the monitoring of the iron status of pregnant women, blood donors, and renal dialysis patients. High ferritin levels may indicate iron overload without apparent liver damage, as may be noted in the early stages of idiopathic hemochromatosis. Ferritin levels in serum have also been used to evaluate clinical conditions not related to iron storage, including inflammation, chronic liver disease, and malignancy