Xia & He Publishing Inc. May 20 2025 Aging is a multifaceted process driven by interconnected biological mechanisms, among which genomic instability and telomere attrition stand as primary hallmarks. Emerging research underscores the pivotal role of the human microbiome in modulating these processes, offering novel insights into aging and age-related diseases. This review synthesizes current evidence on how microbial dysbiosis accelerates aging by disrupting genomic integrity and telomere