Voir sur FrenchStream. What causes mental illness? Do our thoughts, moods, and behaviours depend upon what we eat? Psychiatrists Abram Hoffer and Humphry Osmond met in Saskatchewan in 1951. They set out to prove that the symptoms of schizophrenia could be controlled with healthy, unprocessed food and large doses of vitamins. 60 years later, it looks like they may have been right.