Leaky Gut Test: which diet helps?

The question of which diet helps a 'Leaky Gut Test' is scientifically problematic. 'Leaky gut' (increased intestinal permeability) is not a recognized medical diagnosis but a hypothetical concept. There are no validated, consumer-grade tests that reliably measure a clinically meaningful 'leaky gut'. Even if a test shows elevated markers like zonulin or LPS, the interpretation is uncertain—these markers fluctuate and are not disease-specific. Regarding diet: no single diet has been proven to 'fix' leaky gut in robust clinical trials. Popular recommendations like low-FODMAP, gluten-free, or the GAPS diet are based on anecdotal reports or mechanistic speculation, not strong evidence. A balanced, fiber-rich diet with plenty of vegetables, fermented foods, and minimal processed foods can support general gut health. But claiming that a specific diet can reverse a test-indicated leaky gut is overblown. If you have real digestive symptoms, consult a gastroenterologist before investing in unproven tests or restrictive diets.