Myths vs facts: tTG IgA and sleep

The claim that tTG IgA directly correlates with sleep quality is a myth. tTG IgA (tissue transglutaminase IgA) is a specific biomarker for celiac disease, an autoimmune condition triggered by gluten. Fact: untreated celiac disease can indirectly impair sleep through symptoms like abdominal pain, nutrient deficiencies (e.g., iron, vitamin D), or systemic inflammation. However, there is no strong evidence that tTG IgA levels alone predict or affect sleep. Studies show that celiac patients often report improved sleep after starting a gluten-free diet, but this is a secondary effect. Direct-to-consumer tests for tTG IgA are not validated for sleep assessment; they require clinical confirmation and often a duodenal biopsy. If you have sleep issues, prioritize sleep hygiene, stress management, and ruling out other medical causes. Evidence: human-moderate (observational studies on celiac and sleep, but no causal RCTs).