What do studies say about IgG Unverträglichkeit Check?

Scientific evidence on IgG food intolerance tests is weak and inconsistent. Many studies indicate that elevated IgG levels often reflect a normal immune response to common foods and do not correlate with clinical symptoms. Professional societies such as the European Academy of Allergy and Clinical Immunology (EAACI) advise against using IgG-based tests for diagnosing intolerances, as they lack reproducibility and may lead to unnecessary dietary restrictions. Some providers market these tests as 'lifestyle' tools, but the evidence base remains insufficient. Caveat: a positive IgG result does not necessarily indicate an intolerance; clinical history and physician evaluation are essential. These tests may offer suggestive clues but should not replace evidence-based approaches like elimination diets or oral food challenges.