Serum Iron and Transferrin Saturation (Iron Binding Capacity)

Why It’s Done

Your doctor may order these tests if you have symptoms like fatigue, pale skin, unusual tiredness, or if they suspect conditions like anemia, hemochromatosis (iron overload), or other blood disorders. They might also check iron levels if you’re pregnant, have frequent infections, or have an unusual appetite for non-food items (pica).

What to Expect

A small blood sample is taken from a vein in your arm. The blood is sent to a lab where it’s analyzed to measure iron levels and how much of your transferrin protein is saturated with iron. Results help determine if you need iron supplements or other treatments.

Normal vs. Abnormal Results

There are no standard reference ranges provided here since they can vary by lab. Your results will be interpreted by your healthcare provider based on your overall health and symptoms. Low results may indicate iron deficiency, while high results could suggest iron overload or other conditions.

Common Conditions Linked to These Tests

Low iron levels (low iron or high transferrin saturation) often point to anemia or iron deficiency, which can cause fatigue, weakness, or pale skin. High iron levels (low transferrin saturation) may indicate hemochromatosis or other iron storage disorders. These tests also help monitor conditions like chronic kidney disease or certain infections.