What to watch with tTG IgA and sleep?

tTG IgA is a key biomarker for celiac disease, an autoimmune condition triggered by gluten. Elevated levels may indicate active celiac disease, which can be associated with sleep disturbances due to abdominal discomfort, nutrient deficiencies (e.g., iron, vitamin D), or comorbid conditions like restless legs syndrome. However, the link between tTG IgA and sleep is indirect and not strongly evidenced. Many individuals with elevated tTG IgA have no sleep issues, and sleep problems are highly multifactorial. A single tTG IgA value alone does not predict sleep quality. If celiac disease is suspected, a medical workup is essential; a gluten-free diet may improve sleep in affected individuals. Evidence is primarily mechanistic and observational. Caveat: Do not self-diagnose or self-treat based on a single biomarker.