How are IgG Unverträglichkeitstest and Stress related?

The relationship between IgG food intolerance tests and stress is scientifically weak. IgG tests are often marketed to identify food sensitivities, but mainstream medicine largely rejects them because elevated IgG levels typically reflect normal immune exposure to foods, not intolerance. Stress can influence the gut-brain axis, increasing intestinal permeability and modulating immune responses, which could theoretically affect IgG levels. However, no robust human studies directly link stress to IgG test results. The evidence is mostly mechanistic or marketing-based. Consumers should be aware that IgG tests are not diagnostic for food allergies or intolerances. Managing stress through lifestyle changes and a balanced diet is more evidence-based. For persistent symptoms, consult a healthcare professional. Evidence grade: marketing/unclear.