Do you wake up at 4am?

I used to wake up often between 3:30 and 4:00 in the morning. It was so irritating not to be able to fall back to sleep –or even worse, to fall back to sleep just a half hour before I needed to wake up. …

Bipolar disorder, depression, and circadian clock genes

New research shows that depression and bipolar disorder are linked to changes or disruption in circadian genes. Some people carry genetic variants in the circadian genes that make them more susceptible to circadian disruption.