Article: Black dogs, molecules and madness.(depression causes)

Remember that the physiological cause of depression lies in the nerve cells in the brain. When the levels of the brain messengers called neurotransmitters are too low, messages can't cross the gaps between brain cells, and communication in the brain slows down ... you get depressed. Drugs that boost these chemical levels can relieve depression.

--WebMD, March 2006

DEPRESSION has been around for as long as anyone has recorded. What has long been just another grim fact of life has suddenly become one of the most urgent problems of our times. Private anguish is now in the arena of public health. The economic costs of depression are estimated to be greater ...

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