A Narrative Review of Nutritional Interventions for Schizophrenia: A Pathway to Personalized Care

The management of schizophrenia, a complex and often debilitating mental illness, has traditionally centered on pharmacological interventions. However, the significant adverse effects of antipsychotic medications and the incomplete therapeutic response in many patients have spurred the investigation of adjunctive treatments. Nutritional psychiatry has emerged as a compelling area of interest, with a growing body of research suggesting that specific dietary and nutrient-based interventions could positively impact the underlying pathophysiology of schizophrenia. A narrative review of the scientific literature was conducted, focusing on systematic reviews, meta-analyses, and clinical trials examining nutritional interventions in individuals with schizophrenia. The evidence supporting the use of nutritional interventions in schizophrenia is, at present, largely preliminary and often inconclusive. The review also highlights significant methodological limitations across the existing literature, including small sample sizes, short intervention periods, lack of standardized dietary protocols, and failure to account for the vast individual differences in genetics, metabolism, and baseline nutritional status. Nutritional interventions hold theoretical promise as a safe and accessible adjunctive therapy for schizophrenia. However, the current evidence base is insufficient to form definitive clinical guidelines. The inherent complexity of nutritional science, with its focus on multitarget rather than single-target actions, necessitates a paradigm shift in research methodology. The path forward lies in the adoption of personalized and biomarker-guided approaches.