tTG IgA is an antibody marker for celiac disease. Untreated celiac disease can impair sleep due to malabsorption, inflammation, or associated conditions like iron deficiency or restless legs syndrome. However, testing tTG IgA alone does not improve sleep—it may only lead to a diagnosis and subsequent gluten-free diet, which could indirectly benefit sleep in affected individuals. Evidence for a direct link between tTG IgA and sleep is weak (mechanistic, case reports). MyBody-X offers celiac testing, but without medical follow-up and dietary changes, its impact on sleep is uncertain. Caveat: tTG IgA is not a sleep biomarker; for sleep issues, other causes (e.g., sleep apnea, stress) are more common.
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