article · INTERNATIONAL JOURNAL OF HEALTH AND PHARMACEUTICAL RESEARCH
The human gut hosts a complex microbial community vital for metabolism, immune regulation, and pathogen defence. Communication between this gut microbiota and the central nervous system occurs through bidirectional neural, hormonal, immune, and metabolic pathways known as the microbiota-gut-brain axis. Disruptions in microbial balance, termed dysbiosis, correlate with several psychiatric conditions, such as depression, anxiety, schizophrenia, and autism spectrum disorders. Biological mechanisms underlying these links include altered neurotransmitter production, elevated inflammation, immune malfunction, and modified stress responses. Consequently, microbiome-targeted interventions, including probiotics, prebiotics, synbiotics, and faecal microbiota transplantation, show promise as supportive options in psychiatric care. Integrating this knowledge into mental health nursing can support holistic treatment, patient education, and collaborative practice. However, current research faces inconsistent methodologies and a lack of firm causal evidence, indicating that rigorous longitudinal and experimental investigations remain necessary.
Understanding how gut microbes influence the central nervous system expands approaches to mental healthcare beyond conventional psychiatric paradigms. By connecting gut health to conditions like depression and anxiety, clinicians can explore supportive dietary and microbiological therapies. For mental health nurses, this knowledge supports more comprehensive patient education and holistic treatment plans, although clearer clinical evidence is still required before these approaches can be routinely adopted.
The abstract identifies microbiome-based interventions, specifically probiotics, prebiotics, synbiotics, and faecal microbiota transplantation, as supportive mental health treatments. Intended users include mental health practitioners and psychiatric care providers seeking complementary therapies. However, this work reflects early-stage review research, noting inconsistent methodologies and a lack of causal proof. Commercial applications and therapeutic protocols remain distant from routine clinical adoption until validated through structured longitudinal and experimental studies.
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This review examines the connection between gut microbiota and mental health, highlighting its relevance to mental health nursing and microbiological research. The human gastrointestinal tract contains a diverse population of microorganisms that are essential for metabolic processes, immune function, and defense against pathogens. Increasing scientific evidence emphasizes the microbiota–gut–brain axis as a complex, bidirectional communication system linking the gut and the central nervous system through neural, hormonal, immune, and metabolic pathways. Imbalances in gut microbiota composition, known as dysbiosis, have been linked to various psychiatric disorders, including depression, anxiety, schizophrenia, and autism spectrum disorders. These associations are mediated through mechanisms such as disrupted neurotransmitter synthesis, heightened inflammatory responses, immune dysregulation, and alterations in stress-response systems. The review further explores emerging microbiome-based interventions such as probiotics, prebiotics, symbiotic, and fecal microbiota transplantation, which demonstrate potential as supportive treatments in mental healthcare. For mental health nursing, incorporating knowledge of gut–brain interactions enhance holistic care, patient education, and collaborative practice. However, limitations such as inconsistent methodologies and insufficient causal evidence persist, underscoring the need for further longitudinal and experimental studies.
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DOI: 10.56201/ijhpr.vol.11.no4.2026.pg41.57
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