Seasonal Affective Disorder Linked To Serotonin Protein

Winter: We have all had those moments when we would rather stay in bed than head out into the cold, dark day. But for those with seasonal affective disorder, winter can trigger a severe form of depression. In a new study, researchers claim to have identified what causes the condition.

Lead researcher Brenda McMahon and her colleagues, from the University of Copenhagen in Denmark, recently presented their findings at the European College of Neuropsychopharmacology Congress in Berlin, Germany.

Seasonal affective disorder  is a form of depression that tends to occur at the same time each year, from autumn through winter.

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