Is Stuhlprobe useful for Haut?

Whether a stool sample (microbiome test) is useful for skin conditions like acne or eczema currently lacks strong evidence. Mechanistic hypotheses suggest the gut microbiome may influence inflammation via the gut-skin axis, and some observational studies show correlations between certain bacteria and skin states. However, no robust randomized controlled trials prove that interventions based on stool tests (e.g., probiotics or dietary changes) actually improve skin outcomes. Most consumer tests rely on marketing rather than clinical validity. Individual variability is large, and test interpretations are often speculative. For specific skin issues, consult a dermatologist before investing in stool testing. The evidence is best categorized as marketing-based or mechanistic.