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Doctors have stopped believing that 'chemical imbalance' causes depression. They didn't tell us

Psychiatry has known for some time that the 鈥渟erotonin theory鈥� of depression, the notion that too little of the brain chemical can be a cause of depression, a decades-old hypothesis and deeply entrenched trope in society that helped promote a class of antidepressants taken by millions of Canadians, is wrong, says Montreal psychiatrist Dr. Joel Paris.