Serum or plasma mass fraction of globulin (total globulin protein concentration)

What Does This Test Measure?

Globulins are a group of proteins in your blood that include antibodies (which fight infections), transport proteins (like lipids and iron), and other proteins involved in immune response and clotting. This test quantifies the total mass of these proteins in your serum or plasma sample, often measured as a fraction of total protein content.

Why Might You Need This Test?

Doctors may order this test to evaluate immune function, detect liver or kidney disease, assess protein disorders, or investigate symptoms like fatigue, swelling, or recurrent infections.

Common Conditions Monitored

High globulin levels may suggest chronic infections, autoimmune diseases (e.g., rheumatoid arthritis), or certain cancers. Low levels could indicate malnutrition, liver disease, or kidney problems. This test alone isn’t diagnostic but often used alongside other blood tests for broader evaluation.

How Is the Test Performed?

A small blood sample is drawn from a vein, typically in your arm. The sample is then processed to separate serum or plasma, where the globulin proteins are measured using a specialized laboratory technique (often nephelometry or turbidimetry). Results are expressed as a mass fraction relative to total protein.