Immune Function (IgG, IgM, IgE, IgA)These tests assess your immune function. IgE Test: Measures the level of Immunoglobulin E antibodies, which are associated with allergic responses. IgG Test: Assesses the level of Immunoglobulin G, the most abundant antibody type, essential for long term immunity. Immunoglobulin M (IgM): IgM is usually the first antibody type produced in response to an infection. High levels can indicate a recent or current infection. Immunoglobulin A (IgA): IgA plays