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What causes winter-onset seasonal affective disorder?

Although the exact cause of winter-onset seasonal affective disorder is not clear, it is thought to be due to changes in the levels of specific hormones and neurotransmitters in the brain and changes to the biological clock.

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Author: Dr Joanne Van der Velden PhD, BSc (Hons)
First answered: 25 Nov 2014
Last reviewed: 18 May 2018
Rating: 5.0 out of 5
Votes: 254 (Click smiley face below to rate)
Category: Depression


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