There are many more dark than light hours at this time of year. And when it’s also cold, windy, and wet, and the world situation is trembling, it’s easy to be hit by winter blues.
Less light affects the brain’s chemistry by reducing the level of serotonin, a neurotransmitter that regulates mood and sleep, while the level of the sleep hormone melatonin remains elevated during the day. The low serotonin and high melatonin can make us sad and tired.Oversættelsesdisclaimer