Serum or Plasma Total Iron Concentration (Mass Concentration)

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like fatigue, weakness, pale skin, or shortness of breath, which can indicate low iron levels (anemia). They might also order it if you have a history of blood loss, certain medical conditions, or if you’re pregnant. Additionally, it could be part of routine blood work to monitor iron status in chronic conditions or after treatments like chemotherapy.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the draw if your blood is collected in the morning. Avoid taking iron supplements or certain medications (like multivitamins) for 24 hours before testing, as they can affect results. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

Results are compared to a reference range based on your age, sex, and overall health. Low iron levels may suggest anemia or poor absorption, while very high levels could indicate conditions like hemochromatosis or excessive blood transfusions. Your provider will discuss the results in the context of your symptoms and medical history.

Common Causes of Abnormal Results

Low iron levels can result from chronic blood loss (e.g., heavy periods, gastrointestinal bleeding), poor diet, or conditions like celiac disease or inflammatory bowel disease. High iron levels may stem from genetic disorders, repeated blood transfusions, or overconsumption of iron supplements. Other factors, like pregnancy or certain medications, can also influence results.