Myths vs facts: IgG Unverträglichkeitstest and fertility

The IgG food intolerance test is often marketed as a tool to improve fertility, but this is not supported by scientific evidence. IgG antibodies to foods simply indicate immune exposure, not intolerance or allergy. They are present in healthy individuals and have no proven link to fertility issues. Studies claiming benefits for fertility are lacking or methodologically weak. Major allergy and immunology societies (e.g., EAACI, AAAAI) advise against IgG testing for food intolerance because it leads to unnecessary dietary restrictions and misinterpretation. For fertility problems, evidence-based assessments like hormone panels, ultrasound, and semen analysis are essential. Relying on an IgG test can delay proper diagnosis and may cause nutritional deficiencies if followed strictly. Conclusion: It is a myth that IgG tests can enhance fertility. The evidence is weak and driven by marketing, not science.