Leaky Gut Test: can a DNA test help?

A DNA test cannot diagnose leaky gut. The concept of increased intestinal permeability (leaky gut) is controversial and not recognized as a distinct medical condition by mainstream gastroenterology. DNA tests analyze genetic variants linked to gut barrier function or inflammation, but effect sizes are tiny and evidence is mostly from GWAS or mechanistic speculation. No genetic test can currently measure the actual state of your intestinal barrier or provide a clinically meaningful leaky gut assessment. Functional tests (e.g., lactulose/mannitol challenge) or stool biomarkers like zonulin are sometimes used, but their reliability is also debated. MyBody-X does not appear to offer a dedicated leaky gut DNA test based on available context. If such a test is marketed, it is likely promotional without solid clinical validation. Do not rely on DNA results for gut health decisions; see a gastroenterologist for persistent symptoms.