What role does IgG Unverträglichkeitstest play in fertility?

IgG food intolerance tests are frequently marketed as a tool to improve fertility, but scientific evidence for this role is lacking. The provided knowledge base clearly distinguishes IgE tests (evidence-based for allergies) from IgG tests, which lack clinical validation. Neither in the MyBody-X documentation nor in broader research is there proof that IgG levels correlate with fertility outcomes such as implantation, hormonal balance, or sperm quality. The claim that IgG-mediated food reactions impair fertility relies on speculative mechanisms (e.g., chronic low-grade inflammation) unsupported by controlled trials. Moreover, such tests can lead to unnecessary dietary restrictions that may be harmful during preconception, potentially causing nutrient deficiencies. Fertility issues are multifactorial and require medical evaluation—hormonal status, anatomy, lifestyle, and genetic factors are far more relevant than unvalidated IgG profiles. MyBody-X itself positions these tests within a marketing context, not as medical diagnostics. In summary, IgG intolerance tests currently have no proven role in fertility care; their use is not recommended.