What role does Leaky Gut Test play in skin aging?

The role of a Leaky Gut Test in skin aging is not scientifically well-established. The test typically measures markers like zonulin in stool, intended to indicate increased intestinal permeability. The theory: a leaky gut barrier may allow inflammatory substances into the bloodstream, promoting systemic inflammation and accelerating skin aging (inflammaging). However, the clinical validity of such tests is controversial – they are not approved as medical diagnostics, and evidence for a direct link to skin aging is weak (mostly mechanistic, animal studies, or small observational studies). Longitudinal studies showing that reducing gut permeability actually slows skin aging are lacking. From a MyBody-X perspective: the test can be interesting as part of a holistic health check, but should not be used in isolation for anti-aging assessment. More established factors are diet (fiber, polyphenols), sun protection, sleep, and stress management. The evidence for the Leaky Gut Test in this context is 'mixed' – plausible mechanisms exist, but robust clinical confirmation is absent.