What role does IgG play in Darmgesundheit?

IgG (immunoglobulin G) is an antibody involved in gut immune defense. It is often linked to delayed-type food intolerances (type III allergy), but the scientific evidence is weak. Many commercial IgG food sensitivity tests lack clinical validation and may lead to unnecessary dietary restrictions. In gut health, IgG primarily reflects normal immune exposure to food antigens rather than pathology. More relevant markers for gut health include the microbiome, mucosal barrier integrity, and secretory IgA. Consumer IgG tests are not diagnostic and should not replace medical evaluation for gastrointestinal symptoms.