Is tTG IgA useful for weight loss?

The tTG IgA test is a specific screening tool for celiac disease, not for weight loss. Untreated celiac disease can cause weight loss or failure to gain, but the test itself is not useful for weight management in the general population. In non-celiac individuals, tTG IgA has no predictive value for diet outcomes. Evidence is purely clinical (practice), not weight-related. Caution: a positive result requires gastroenterological follow-up, not self-directed diet changes. For weight loss, focus on caloric balance, nutrient density, and physical activity – not autoantibodies.