Fasting Required: Yes - 10 to 12 hours Specimen: Blood Results: 5-7 Business Days Description: Blood levels are used to evaluate anemia and deficiency. High transferrin levels are found in iron deficiency, pregnancy, and in those taking birth control pills. It is low in liver disease, kidney disease, cancer, chronic inflammation, hereditary transferrin deficiency, or when there are excessive amounts of iron in the body. Methodology: Nephelometry Reference Range(s): 188-341 mg/dL Clinical Significance: Transferrin is a direct measure of the iron binding capacity. Transferrin is thus useful in assessing iron balance. Iron deficiency and overload are often evaluated with complementary laboratory tests.