Akkermansia muciniphila in the Gut–Bone Axis: Current Insights and Translational Implications

ABSTRACT Osteoporosis and other skeletal disorders pose major global health challenges, yet their pathogenesis cannot be fully explained by bone‐intrinsic mechanisms alone. Emerging evidence highlights the gut microbiota as a crucial regulator of skeletal homeostasis, linking intestinal ecology to bone remodeling through immune modulation, microbial metabolism, and host‐microbe communication. Among the intestinal commensals, Akkermansia muciniphila has attracted growing attention as a next‐generation probiotic with unique implications for the gut–bone axis. This bacterium colonizes the intestinal mucus layer, helps preserve barrier integrity, modulates immune tolerance, and shapes microbial cross‐feeding networks. Recent preclinical evidence connects A. muciniphila and its extracellular vesicles (EVs) to protection against osteoporosis, periodontal bone destruction, osteoarthritis, and aging‐associated skeletal decline, suggesting a broader role for A. muciniphila in osteoimmune regulation and tissue resilience. This work synthesizes current advances, positioning A. muciniphila as a linchpin linking gut ecology and bone health, while also highlighting unresolved questions concerning strain specificity, host‐context dependence, dosing, safety, and molecular mechanisms. Understanding how A. muciniphila orchestrates communication across the gut‐bone axis not only sheds light on fundamental host–microbe interactions but also opens new avenues for microbiota‐based strategies to prevent and treat skeletal diseases.