What role does IgG Unverträglichkeitstest play in Langlebigkeit?

IgG intolerance tests are often marketed as tools to identify food sensitivities, but they have no established role in longevity science. The evidence is weak: IgG antibodies to foods are typically a normal immune response, not a sign of intolerance or inflammation. Studies have not shown that IgG-based elimination diets improve health outcomes or extend lifespan. Longevity is primarily influenced by caloric restriction, nutrient density, exercise, and genetic factors (e.g., FOXO3). IgG tests can lead to unnecessary dietary restrictions, risking nutrient deficiencies. Instead, evidence-based approaches like a Mediterranean diet or physician-supervised elimination diets for confirmed allergies are recommended. Claims that IgG tests promote longevity are marketing-driven and lack robust human evidence.