Can IgG help with gut health?

IgG food sensitivity tests are often marketed to improve gut health, but the scientific evidence is weak. IgG antibodies to foods typically reflect normal immune exposure, not intolerance or inflammation. Studies have not shown reliable links between IgG levels and gut symptoms like bloating or diarrhea. Major medical organizations, including the European Academy of Allergy and Clinical Immunology, advise against using IgG tests for diagnosis, as they can lead to unnecessary dietary restrictions and nutritional deficiencies. For genuine gut health issues (e.g., IBS, IBD), validated methods like stool tests, breath tests, or endoscopy are recommended. Caveat: IgG tests are not diagnostic; focus on whole foods and consult a doctor for persistent symptoms.