Seasonal Affective Disorder

Also known as SAD, Winter Depression, Seasonal Depression, Winter Blues

Seasonal Affective Disorder (SAD) is a recurrent form of depression that follows a seasonal pattern, most commonly emerging in autumn and winter when daylight hours shorten. It is thought to be caused by disruptions to circadian rhythms, reduced serotonin activity, and overproduction of melatonin triggered by decreased sunlight exposure. Many people seek natural alternatives such as light therapy, vitamin D, and herbal supplements to manage symptoms with fewer side effects than conventional antidepressants.

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