How are IgG Unverträglichkeitstest and sleep related?

IgG food intolerance tests are often marketed as a way to identify foods that may cause sleep disturbances via low-grade inflammation. However, the scientific evidence linking IgG antibodies to actual intolerance or sleep quality is weak. Most IgG tests lack clinical validation; they frequently yield false positives and are not recommended by allergy or gastroenterology guidelines. Sleep issues are more reliably linked to circadian rhythm dysregulation, cortisol patterns, and lifestyle factors. MyBody-X offers cortisol testing for circadian insight, but even that is not a diagnostic tool. For sleep problems, focus on sleep hygiene, stress management, and medical evaluation rather than IgG testing. The marketing of IgG tests for sleep is not supported by robust evidence.