Millions of people suffer from seasonal affective disorder, a form of depression thought to be caused by changes in the circadian rhythm. Many use light therapy as one strategy to combat symptoms that ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Nancy Redd Shifts in the number of daylight hours — due to changing seasons or ...

The shorter daylight hours and reduced sunlight in the fall and winter mean less light exposure, which can make you want to hit snooze on your alarm clock and sleep all day. This case of the seasonal ...

Seasonal affective disorder (SAD), now known clinically as major depressive disorder with seasonal patterns, is a condition that causes sadness or depression when the seasons change. It most typically ...