Serum or plasma concentration of a specific protein or peptide measured by immunoassay (e.g., a marker for renal or liver function, inflammation, or endocrine status)

Why This Test Might Be Ordered

Your doctor may recommend this test if they suspect issues like liver disease, kidney problems, infections, or hormonal imbalances. It could also be part of routine monitoring for conditions like diabetes, thyroid disorders, or cancer.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours if the test involves a specific protein (e.g., some hormone tests). Bring any medications you’re currently taking to your appointment.

What the Test Involves

A healthcare professional will draw blood from a vein in your arm. The sample is then sent to a lab for analysis. The result will show the concentration of the protein or molecule in your blood, measured in standard units.

What the Results Mean

Results may be compared to a reference range provided by your doctor, which varies depending on the specific protein tested. High or low levels might indicate underlying health concerns that need further evaluation.