Myths vs facts: Leaky Gut Test and gut health

The concept of 'leaky gut' (increased intestinal permeability) is scientifically debated. While permeability is a real phenomenon in certain diseases (e.g., celiac, Crohn's), there is no validated clinical test for 'leaky gut' as a standalone condition. Commercial tests (e.g., zonulin, LPS antibodies) often lack robust evidence and are marketed prematurely. Gut health is multifactorial: diet, microbiome, stress, medications. A single biomarker cannot capture this complexity. Instead of unproven self-tests, focus on a fiber-rich diet, fermented foods, and medical evaluation for persistent symptoms. Evidence for commercial leaky gut tests is weak to misleading.