Allergy & immunology lab tests

IgA is an antibody that protects the moist linings of your body, like your gut, airways, and mouth. This can show how much of it your body makes.

IgE is the antibody behind allergic reactions. Levels can run higher with allergies, asthma, and eczema, but the total can’t show what you’re allergic to.

IgG is your body’s most common antibody, and it carries long-term protection from past infections and vaccines. This can show whether your overall level runs low, normal, or high.

Tryptase is released by mast cells, immune cells that set off allergic reactions. It can jump during a severe reaction, while a level taken on an ordinary day can show your usual baseline.