What to watch with Leaky Gut Test and skin aging?

The combination of a leaky gut test and skin aging is poorly supported by evidence. Leaky gut tests (often IgG-based or measuring zonulin) are marketed as indicators of intestinal barrier dysfunction, but their clinical validity is questionable – especially regarding skin aging. While there is some mechanistic plausibility that chronic inflammation and altered gut microbiota can affect skin health via the gut-skin axis, direct studies linking leaky gut test results to skin aging are lacking. Evidence is mostly mechanistic or from animal models. Many commercial tests are not standardized and may lead to misinterpretation. For those concerned about skin aging, proven strategies include a balanced diet, sun protection, and healthy lifestyle habits – not unvalidated tests. Be cautious of marketing claims that oversimplify the connection.