Immunoglobulins Blood Test Test
This test measures the amount of immunoglobulins (antibodies) in your blood to help check how well your immune system is working.
What this test measures
An immunoglobulins blood test measures the levels of three main types of antibodies: IgM, IgG, and IgA. These proteins help your body fight infections.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
According to MedlinePlus, high levels of one or more immunoglobulins may be caused by an autoimmune disease, hepatitis, cirrhosis, a chronic infection, or certain cancers such as multiple myeloma or lymphoma.
Lower-than-normal results
According to MedlinePlus, low levels of one or more immunoglobulins may be caused by conditions that reduce protein in the body (like kidney disease or malnutrition) or conditions that affect your ability to make immunoglobulins (like complications from diabetes or a genetic disease such as common variable immunodeficiency disorder).
Frequently asked questions
What are immunoglobulins?
Immunoglobulins, also called antibodies, are proteins your immune system makes to fight germs like viruses and bacteria.
What does the test measure?
It usually measures three main types: IgM, IgG, and IgA antibodies.
Can this test diagnose a condition by itself?
No, an immunoglobulins blood test alone cannot diagnose any condition. You will likely need more testing.
What can cause high immunoglobulin levels?
High levels may be due to autoimmune disease, hepatitis, cirrhosis, chronic infection, or certain cancers like multiple myeloma.
What can cause low immunoglobulin levels?
Low levels may be due to kidney disease, serious burns, malnutrition, or genetic conditions like common variable immunodeficiency disorder.
Related lab tests
Sources
- MedlinePlus: Immunoglobulins Blood Test — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.