Brown-eyed girls are up to two times as likely to feel blue when the weather is ...

Women with dark eyes at twice the risk of seasonal affective disorder than men with blue eyes, University of South Wales researchers found Dark eyes let in less sunlight during shorter days of year, affecting production of ‘happy hormone’ serotonin Blue eyes 'may have developed in European people as genetic mutation 10,000 years ago to help protect them from depressive effects of winter'

By Daily Mail Reporter

Published: 23:57 BST, 2 May 2018 | Updated: 23:57 BST, 2 May 2018

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Women with brown eyes are more than twice as likely to feel down when the weather is bad, a study has found.

Researchers found those with dark eyes were at twice the risk of seasonal affective disorder, also known as SAD, than men with blue eyes.

This is because dark eyes let in less sunlight during shorter days of the year, affecting the production of ‘happy hormone’ serotonin.

Researchers at the University of South Wales found those with dark eyes were at twice the risk of seasonal affective disorder, also known as SAD, than men with blue eyes. (File photo)

Researchers at the University of South Wales found those with

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