What role does IgG Unverträglichkeitstest play in Schlaf?

The question about the role of IgG intolerance tests in sleep cannot be answered from the provided context. The sources contain no data or studies linking IgG tests to sleep quality or disorders. IgG tests are often marketed as lifestyle tools, but they are not scientifically validated for diagnosing food intolerances. The measured IgG antibodies frequently reflect normal immune exposure rather than a pathological reaction. There is no evidence-based recommendation to use IgG tests to improve sleep. Sleep issues can stem from many causes (e.g., stress, sleep hygiene, medical conditions like sleep apnea). Anyone considering an IgG test should be aware that the evidence is weak and results should not be the sole basis for dietary changes. A physician or dietitian can offer more reliable diagnostics and advice for sleep problems.