Dysbiosis

The supplied material supports environmental and genetic factors as contributors to microbiota perturbation. Diet is also identified as an influence on microbiota composition, and the gut-liver axis review notes dietary, genetic, and environmental inputs as relevant to microbial balance. Beyond that, the grounding does not support a more specific aetiology.

Dysbiosis reflects disruption of the normal symbiotic relationship between host and microbiota, with loss of homeostatic balance. The reviews describe downstream effects on immune regulation, colonization resistance, and host microbial interactions, with inflammation as a common consequence. In the gut-brain and gut-liver contexts, altered microbial communities can affect signaling through the immune system, tryptophan metabolism, the vagus nerve, the enteric nervous system, and microbial metabolites.

Environmental factors, genetic factors, and diet are supported as influences that can shift microbiota composition and increase the likelihood of dysbiosis. The literature also indicates that early-life factors can shape microbiota composition, but the supplied abstract is truncated and does not specify which factors. No additional risk factors are supported by the grounding.

The grounding supports microbiota-directed approaches at the class or modality level, including probiotics and synbiotics. It also frames dysbiosis as a target for management or prevention of inflammatory and metabolic disorders, but does not provide specific treatment protocols. No other standard therapies are supported by the supplied material.