Reviewing Nutritional Add-Ons for Schizophrenia: Probiotics, Omega-3s, and Plant Compounds

This systematic review looked at nine randomized clinical trials testing nutritional supplements alongside standard treatment for people with schizophrenia. The researchers wanted to see whether things like probiotics, vitamin D, selenium, omega-3 fatty acids, and plant-based compounds could support clinical, metabolic, or cognitive outcomes when added to usual care.

Probiotics, especially when paired with vitamin D or selenium, were linked to improvements in certain metabolic markers and some inflammation-related measures. Omega-3 fatty acid supplementation was associated with changes in triglyceride levels and markers related to brain cell growth and repair (neurotrophic markers). Plant-derived bioactive compounds showed some association with improvements in negative symptoms and stress-related measures.

The authors were careful to note that the trials varied a lot in terms of doses, protocols, and how outcomes were measured, and sample sizes were generally small with short follow-up periods. Because of this variability, they concluded that while these nutritional strategies show potential as adjunctive approaches, more rigorous and larger trials are needed before firm conclusions can be drawn.