Evidence check: Zöliakie Test in the context of sleep

A celiac test (e.g., IgA-tTG) is a medical diagnostic tool, not a lifestyle test. There is evidence that untreated celiac disease can impair sleep through malabsorption, inflammation, or associated conditions (e.g., iron deficiency, thyroid disorders) leading to nocturnal pain, restless legs syndrome, or fatigue. However, the direct causal link between celiac and sleep quality is based on moderate observational evidence. A positive celiac test alone does not predict sleep problems; other causes are common. According to the provided context, MyBody-X tests are not medical devices and cannot replace a doctor. For sleep issues, a full medical workup including sleep hygiene and organic causes is essential. The evidence for combining a celiac test with sleep assessment is therefore moderate: plausible mechanisms exist, but controlled studies are limited.