This seems consistent with Chris Palmer's hypothesis, that mental disorders are metabolic disorders of the brain, discussed in his new book Brain Energy[0]. He's done lots of podcast interviews[1], if you don't want to read the book.
I recommend the book The Schizophrenias - Ours to conquer by Carl C. Pfeiffer. It divides schizophrenia into several phenotypes that have metabolic causations.
I used to have manic episodes for my whole life, but managed without medication. After I fixed my histamine oversupply in the body around march(by cutting folic acid and histamine-rich foods from my diet and taking L-methylfolate supplements), I haven't had another episode.
I used to have allergies and crazy food cravings for sugar and other unhealthy stuff because of the histamine issues which are gone now. This phenotype is called histadelia.
Then there is histapenia, where you have too much copper accumulated in your body and it can’t get rid of them unless you take higher doses of zinc and mangan(and a chelator to avoid complications). Folate and histamine levels are too low.
Overall B-Vitamins are pretty important. If you need them its way higher doses than RDA(b3, b6, b2)
Thyroid problems can be involved in schizophrenia, aswell as gluten intolerance.
In what way is this consistent? The authors describe toxoplasma infection forming cysts in the brain as a result of immune response. The cysts then release neurotransmitters, primarily dopamine and glutamate, which presumably causes the cognitive symptoms of schizophrenia.
The idea that toxoplasmosis is a contributing factor to mental illness is decades old. This paper is merely an incremental restatement of that hypothesis. The abstract says, "Instead of just alleviating symptoms with drugs, the parasite x genotype x stress model emphasizes that schizophrenia treatment should focus on detecting and treating possible underlying microbial infection(s), neuroinflammation, gut dysbiosis, and chronic stress."
Chris Palmer's treatment emphasizes reduction of inflammation and dysbiosis via dietary means. This hypothesis is not limited to treatment of schizophrenia, but also other mental illness, such as bipolar disorder. The following two recent podcasts are illuminating.
[0] https://www.chrispalmermd.com/ [1] https://www.listennotes.com/search/?q=chris%20palmer%20md&so...