The relationship between stool samples and longevity is an emerging area of research. Stool samples are used to analyze the gut microbiome – the community of bacteria, fungi, and viruses in the intestines. Studies suggest that a diverse and stable microbiome is associated with lower inflammation, better immune function, and metabolic health, which may influence lifespan. However, the evidence is still largely mechanistic, based on animal models or small human studies. Longevity is determined by many factors (genetics, diet, lifestyle), and looking solely at the microbiome via a stool sample is insufficient for individual predictions. Commercial tests claiming direct longevity insights should be viewed with caution. A stool sample can be a useful part of a comprehensive health assessment, but not a standalone indicator of longevity.
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