Whether a microbiome test can help with longevity is not yet scientifically settled. Basic research suggests the gut microbiota influences inflammation, metabolism, and immune function – all processes linked to aging. However, large-scale human studies directly proving that a microbiome test leads to extended lifespan are lacking. Most commercial tests provide a snapshot of bacterial composition based on reference populations, which may not be individually actionable. Interpretation is often oversimplified and marketing-driven. A microbiome test can be a useful part of a broader health assessment, e.g., to reflect on dietary habits, but it should not be the sole basis for anti-aging interventions. Evidence: practice/mixed. Sources: none specific in context.
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