Diagnostics·Diagnostics
Immunoglobulin levels
Informed by recognized medical guidance
Overview
Immunoglobulin levels are a blood test that measures the amount of antibodies (proteins that help your body fight infections) in your blood. This test helps doctors check if your immune system is working properly.
Key facts
- Immunoglobulins are also called antibodies.
- There are different types – IgG, IgA, IgM, IgD, and IgE – that each play a role in fighting infections.
- Abnormal levels can mean your immune system is either too low (not enough protection) or too high (overactive).
Yes, immunoglobulin level testing is a common blood test used when doctors suspect an immune system problem.
Anyone can need this test, but it is often done in people who get frequent infections, have autoimmune conditions, or have a family history of immune disorders.