Myths vs facts: IgG and fertility

The myth is that IgG food sensitivity tests can help improve fertility. In fact, there is no strong scientific evidence linking IgG levels (especially IgG4) to fertility outcomes. IgG tests are often marketed for 'food sensitivities', but major allergy and immunology societies do not recommend them. Detected IgG antibodies usually reflect normal immune exposure, not intolerance. For fertility, relevant factors include hormone status, thyroid function, vitamin D, and lifestyle. Relying on IgG tests may lead to unnecessary dietary restrictions and potential nutrient deficiencies. Anyone trying to conceive should use evidence-based diagnostics and consult a specialist rather than commercial IgG panels.