Immunoglobulin G (IgG) details
Description
Immunoglobulin G (IgG) is your body's most abundant antibody class and the main one responsible for long-term immune memory — once you've been exposed to a particular infection or vaccinated against one, IgG antibodies specific to that pathogen typically persist for years, providing lasting protection. A total IgG test measures your overall IgG level rather than reactivity to anything specific, and low total IgG can point toward an immune deficiency affecting your ability to maintain long-term immunity, increasing susceptibility to recurrent infections.
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Blood tests with Immunoglobulin G (IgG)
Explore available tests to better understand your results and gain deeper insights into your health.
Single marker
Immunoglobulin G
$14.99
Immunoglobulin G (IgG Total) is the most abundant antibody in the blood that provides long-term immunity by recognizing and neutralizing pathogens. Measuring total IgG helps evaluate immune status and detect immune deficiencies or chronic infections.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
Panel
Immunoglobulin G Subclasses Panel
$65.99
Measurement of IgG subclasses may be helpful in the management and understanding of immunodeficiency diseases, hypersensitivity states, and conditions involving susceptibility to infection.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin G Subclass 1
- Immunoglobulin G Subclass 2
- Immunoglobulin G Subclass 3
- Immunoglobulin G Subclass 4
Immunoglobulins A/G/M
$35.99
This test measures total IgG, IgA, and IgM. Elevated IgG, IgA, and/or IgM levels are seen in hypergammaglobulinemia, chronic inflammatory conditions, and lymphoproliferative diseases. Decreased levels are associated with hypogammaglobulinemia and immunodeficiency states.
- Immunoglobulin A (IgA) One of your main antibody classes, concentrated in mucous membranes (gut, respiratory tract). Low levels are linked to recurrent infections; also checked before certain other antibody tests, like celiac panels.
- Immunoglobulin G (IgG) Your most abundant antibody class, providing long-term immune memory against past infections. Low levels can point to an immune deficiency.
- Immunoglobulin M (IgM) The antibody class your body produces first in response to a new infection. Elevated levels often indicate a recent or acute infection.