Serum measurements are useful in the diagnosis of iron deficiency and hemochromatosis.
Iron: The serum iron level is a measure of the circulating iron in the blood. It tells us (along with TIBC/UIBC, transferrin and ferritin) the state of the body's iron reserves. An excess in a health screening can indicate disorders of iron storage (such as haemochromatosis), while low levels may indicate (along with changes in TIBC/UIBC, transferrin saturation and ferritin) iron deficiency.
TIBC: The TIBC (total iron binding capacity) is a measure of the body's ability to store iron. The higher the level within a health screening, the less iron there is in reserve. This test can be used to detect iron deficiency, and also conditions of iron excess (such as haemochromatosis). It is an equivalent test to UIBC.