It is well known that the "science" of mental illness is actually economics.

Research goes in the direction that will produce money for the groups doing research. Here is an example of a research path that could lead easily to a food based treatment for a major mental illness, but instead will probably result in the creation of an expensive new medication with horrific side effects.

 

http://www.ncbi.nlm.nih.gov/pubmed/17573079

http://questioning-answers.blogspot.com/2012/08/kynurenic-acid-hypothesis-schizophrenia.html