Everybody feels sad once in a while. Depression, on the other hand, is a complex condition characterized by profound sadness, lethargy, feelings of worthlessness, and a loss of interest in social activities. About 15 million people in the U.S. are diagnosed with clinical depression each year.

I'm Depressed? That's Crazy!

Some people don't want to admit they have a problem, and why that's normal

The Best Therapy for Depression?

Read why evidence is pointing toward CBT

How Exercise May Boost Your Mood

The research is mixed, but many depression sufferers swear by it

sponsored stories