Vibrant does not recommend a “food challenge” to a patient who is already aware they have adverse symptoms driven by a food. However, if the antigen has been removed for a significant amount of time (variable amongst individuals), the body may no longer mount an IgA/IgG antibody response. To learn more about the lifespan of IgA and IgG antibodies, please view the Food Immunoglobulins handout.
Do I need to eat a food prior to Food Sensitivity testing to get accurate results?
Adair
