Can tTG IgA help with sleep?

tTG IgA is a biomarker for celiac disease, an autoimmune condition triggered by gluten. There is no direct evidence that tTG IgA itself improves sleep. However, undiagnosed celiac disease can contribute to sleep disturbances through malabsorption (e.g., iron deficiency), inflammation, or associated conditions like restless legs syndrome. In such cases, a positive tTG IgA test may lead to a gluten-free diet, which can improve sleep quality in affected individuals. The evidence is indirect and based on observational studies; randomized controlled trials are lacking. The test is not a sleep screening tool but a diagnostic for celiac disease. Without relevant symptoms or risk factors, testing tTG IgA for sleep optimization is not recommended. If celiac disease is suspected, consult a physician. Caveat: false positives can occur, especially with IgA deficiency or other autoimmune conditions.