Redirected from Seasonal Affective Disorder
It is believed that SAD is related to a lack of serotonin and that exposure to wide-spectrum artificial light may improve the condition by stimulating seratonin production. Light therapy appears to be effective in treating SAD, but the exact mechanism of the effect is still unknown.
One recent trial seemed to indicate that shining a bright light behind the sufferers' knees would be beneficial, but when the trial was duplicated on a larger scale, the results were negative.
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