How are Leaky Gut Test and fertility related?

The relationship between a 'leaky gut' test and fertility is not well established in evidence-based medicine. Leaky gut refers to increased intestinal permeability, which may allow microbial products and undigested food particles to enter the bloodstream, potentially triggering systemic inflammation and immune responses. In theory, this could affect fertility by disrupting hormonal balance, impairing implantation, or promoting autoimmune conditions. However, high-quality clinical studies directly linking leaky gut to infertility are lacking. Most commercially available leaky gut tests (e.g., stool zonulin, lactulose-mannitol) are not validated for fertility assessment and are not recommended by major medical societies. A positive test result does not provide actionable information for fertility treatment. Instead, a thorough evaluation by a reproductive specialist, including thyroid function, vitamin levels, and inflammatory markers, is more evidence-based. The evidence for using leaky gut tests in fertility contexts is currently mixed to unclear, and patients should be cautious about overinterpreting such results.