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For gut issues like bloating, diarrhea, or abdominal pain, the first step is a medical evaluation to rule out serious conditions. Many people turn to self-tests such as DNA analyses (e.g., for lactose intolerance) or IgG blood tests for food sensitivities. However, the evidence is critical: IgG tests measure immune memory, not allergies or intolerances, and are not recommended by medical societies. DNA tests for gluten sensitivity (NCGS) or metabolic variants (e.g., MTHFR) often lack clinical validation for specific dietary advice. A negative genetic result does not rule out celiac disease or other gut disorders. More reliable approaches include stool analysis, breath tests (lactose/fructose), or an elimination diet under professional guidance. MyBody-X offers blood tests like the Hormon- & VitalCheck that can provide general insights, but they are not a substitute for targeted gut diagnostics. For persistent symptoms, consult a gastroenterologist rather than relying solely on consumer tests.