Harvard Men's Health Watch

Shining a light on winter depression

Light therapy can help you avoid seasonal affective disorder. Winter does not officially begin until Dec. 21, but as the days grow shorter and sunlight exposure becomes scarcer, seasonal affective disorder (SAD) becomes more common. SAD is a type of depression that occurs during the late fall and early winter and often ends by spring or early summer. The exact cause of SAD is unknown, but research points to lack of light as…

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