What role does Stuhlprobe play in longevity?

Stool testing (microbiome analysis) is increasingly marketed as a tool for longevity. It can reveal gut microbiota composition, which is linked to inflammation, metabolism, and immune function—factors that may influence lifespan. However, the evidence for a direct causal role of specific microbiome profiles in human longevity remains weak. Most findings come from animal models or cross-sectional studies (e.g., centenarians), which do not prove causation. Moreover, stool samples are highly variable due to diet, medications, and lifestyle, making a single snapshot of limited predictive value. From a scientific standpoint, stool testing is an exploratory tool, not a validated longevity marker. Users should interpret results cautiously and avoid making drastic supplement or diet changes based solely on such tests. Safety note: stool tests are non-invasive, but commercial interpretations often overstate clinical relevance. For evidence-based longevity, established biomarkers (HbA1c, CRP, lipids) and lifestyle factors (exercise, sleep, nutrition) remain more reliable.