What should I know about leaky gut?

The provided context does not contain specific information about 'leaky gut'. The term describes a hypothetical increase in intestinal permeability, allowing substances to pass into the bloodstream. Mainstream medicine does not recognize leaky gut as a standalone diagnosis due to limited clinical evidence. Some studies link increased permeability to conditions like irritable bowel syndrome or celiac disease, but causality remains unclear. The FUT2 variant rs3877899 (from context) influences gut microbiota composition but has no proven direct link to leaky gut. Many marketed supplements and diets claim to 'heal' leaky gut without robust clinical support. Be cautious of exaggerated marketing claims. If you suspect gut issues, consult a healthcare professional rather than relying solely on genetic or self-tests.