Seasonal Affective Disorder (SAD) is a condition believed to be linked to a lack of sunlight where the individual experiences mood changes and emotions similar to depression. SAD occurs mostly in the Fall and Winter months when there is less sunlight exposure.
It’s found that around 5 percent of people may experience SAD lasting 40% of the year (especially in areas with less sunlight such as the Pacific Northwest and other Northern regions), and it is more common in women than in men. continue reading