Iron, Serum or Plasma Concentration

Why Is This Test Done?

Your doctor may order this test if you have symptoms like fatigue, pale skin, weakness, or shortness of breath. It can also be used to diagnose or monitor conditions such as iron deficiency, hemochromatosis, or certain types of anemia. Sometimes, it’s checked during pregnancy or if you’re taking supplements that might affect iron levels.

What to Expect Before the Test

You’ll typically have a small needle inserted into your arm or hand to draw blood. The process is quick and usually painless. If you’re on blood thinners or have a history of bleeding issues, your doctor may give you specific instructions. Avoid eating or drinking anything for a few hours before the test if your lab has specific guidelines.

What the Results Mean

Results can vary based on your health, diet, and other factors. Low iron levels may indicate anemia or poor absorption, while very high levels could suggest conditions like hemochromatosis or excessive intake. Your doctor will interpret the results in the context of your overall health and symptoms.

Common Causes of Abnormal Results

Low iron levels can be caused by heavy menstrual bleeding, poor diet, pregnancy, or conditions that prevent the body from absorbing iron. High iron levels may result from genetic disorders, repeated blood transfusions, or excessive intake of iron supplements.