Lay opinion vs evidence: IgG Unverträglichkeit Männer

Lay opinion often holds that IgG food intolerance tests (especially marketed to men) can identify which foods to avoid for better health. The evidence, however, is clear: IgG antibodies reflect normal immune exposure to food proteins, not intolerance or allergy. Numerous studies show no correlation between IgG levels and clinical symptoms; the tests have high false-positive rates and lack reproducibility. Medical guidelines (e.g., from the German Society for Allergology, EAACI) explicitly recommend against using IgG tests for diagnosing food intolerances. For men, no sex-specific evidence alters this conclusion. The tests are primarily a marketing tool, often leading to unnecessary dietary restrictions and potential nutrient deficiencies. If a genuine intolerance is suspected, evidence-based approaches like a symptom diary followed by an elimination diet under medical supervision are appropriate. The broader context of DNA-based diet tests also shows weak evidence; IgG tests are even less supported.