Enzymatic cofactors (vitamins) many not a be cure, but maybe a better, cheaper, less harmful, treatment. Take pyridoxine (B6) as an example.

Also, did you know vitamin C deficiency not only casues scurvy but mood disorders as well? The neuropsychiatric effects of vitamin C deficiency: a systematic review https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7302360/

on Pyridoxine:

Pyridoxamine: A novel treatment for schizophrenia with enhanced carbonyl stress https://onlinelibrary.wiley.com/doi/full/10.1111/pcn.12613

Vitamin B6 deficiency hyperactivates the noradrenergic system, leading to social deficits and cognitive impairment https://www.nature.com/articles/s41398-021-01381-z

Vitamin B6 as add-on treatment in chronic schizophrenic and schizoaffective patients: a double-blind, placebo-controlled study https://pubmed.ncbi.nlm.nih.gov/11838627/

Decreased serum pyridoxal levels in schizophrenia: meta-analysis and Mendelian randomization analysis https://www.jpn.ca/content/43/3/194.abstract

Treatment of Pyroluric Schizophrenia(Malvaria) With Large Doses of Pyridoxineand a Dietary Supplement of Zinc https://isom.ca/wp-content/uploads/2020/01/JOM_1974_03_4_11_...