Iron (Serum or Plasma Concentration)

What Is Iron Used For?

Iron is a vital mineral that plays a key role in producing hemoglobin, the protein in red blood cells that carries oxygen from your lungs to the rest of your body. It also helps with energy production, immune function, and muscle movement. Low iron levels can lead to fatigue, weakness, or anemia, while high levels may cause health risks like organ damage or heart problems.

Why Might You Need This Test?

Your doctor may order an iron test if you have symptoms like extreme fatigue, pale skin, shortness of breath, or unusual cravings for non-food items (pica). It’s also used to diagnose or monitor conditions such as anemia, pregnancy, heavy menstrual bleeding, or certain medical treatments that affect iron absorption.

How Is the Test Performed?

A small blood sample is taken from a vein in your arm. The sample is sent to a lab, where it is analyzed to measure the iron concentration in your serum or plasma. Results are typically available within a few days.

What Do the Results Mean?

Results are compared to standard reference ranges, which can vary by lab. Low iron levels may indicate anemia or poor absorption, while high levels may suggest conditions like hemochromatosis or excessive iron intake. Your doctor will interpret results in the context of your symptoms and medical history.