(versión en español: pinchar aquí)
“[…] our results showed that a vegetarian diet is associated with poorer health (higher incidences of cancer, allergies, and mental health disorders), a higher need for health care, and poorer quality of life”. (ver)
“Vegetarians displayed elevated prevalence rates for depressive disorders, anxiety disorders and somatoform disorders.”. (ver)
In a visual form, incidence of several mental health disorders in vegetarians and non vegetarians:
These are two epidemiological studies. Therefore they only show a statistical relationship between mental disorders and the vegetarian diet, but not a cause-effect relationship. May be there is a common cause for both, or may be people suffering fom mental disorders are more prone to become vegetarians. It is also possible that the vegetarian diet is the common cause of those disorders.