Is tTG IgA useful for Schlaf?

The tTG IgA test is a well-established screening marker for celiac disease (human-strong). It measures antibodies against tissue transglutaminase and is used when gluten intolerance is suspected. For sleep disorders, it is not a specific test. However, undiagnosed celiac disease can indirectly affect sleep quality through malabsorption (e.g., iron, vitamin D deficiencies) or immune-mediated inflammation. The evidence for this link is weak (human-moderate) and based on observational studies. Important: The test requires a gluten-containing diet; false positives can occur (e.g., in IgA deficiency or other autoimmune conditions). Without clinical symptoms or risk factors, screening for celiac disease solely due to sleep issues is not recommended. Consult a physician before taking the test or starting a gluten-free diet. MyBody-X does not offer this test; the provided contexts contain no information on tTG IgA or sleep.