Can Leaky Gut Test help with longevity?

Whether a 'Leaky Gut Test' can aid longevity is not supported by current evidence. The concept of increased intestinal permeability is often marketed by direct-to-consumer companies, but no validated test exists that reliably predicts or improves lifespan. The provided context highlights that IgG food sensitivity tests (frequently sold as leaky gut tests) lack medical validity and are not recommended by guidelines. Similarly, DNA-based longevity tests (e.g., MyBody-X DNA Longevity-Test) have limited predictive power and are more marketing than evidence-based. While mechanistic links between gut permeability, inflammation, and aging are discussed in research, no clinical trials demonstrate that leaky gut testing directly extends longevity. Proven strategies for healthy aging include a fiber-rich diet, exercise, stress management, and avoiding unnecessary medical tests that may lead to overdiagnosis or restrictive diets, especially in children. The evidence grade for leaky gut tests in longevity is 'marketing/unclear'. Consumers should be cautious of overblown claims and focus on lifestyle interventions with robust evidence.