Myths vs facts: IgG Unverträglichkeitstest and Schlaf

IgG food intolerance tests are often marketed as a tool to improve sleep, but the scientific evidence is weak. IgG antibodies to foods are typically a normal immune response, not a sign of intolerance. Major medical organizations, including the European Academy of Allergy and Clinical Immunology, advise against these tests for diagnosing food intolerances. Sleep is influenced by many factors: stress, sleep hygiene, genetics (e.g., MTNR1B melatonin receptor variants), and lifestyle. There is no robust evidence that eliminating foods based on IgG results improves sleep quality. Claims linking IgG tests to better sleep are largely marketing-driven and lack controlled clinical trials. Consumers should be cautious and focus on evidence-based sleep strategies: consistent bedtime, limited screen time, exercise, and medical consultation if needed. Spending money on IgG tests for sleep issues is not supported by science.