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Body clocks of depressed people altered at cell level, researchers show
medicalxpress.com
Every cell in our bodies runs on a 24-hour clock, tuned to the night-day, light-dark cycles that have ruled us since the dawn of humanity. The brain acts as timekeeper, keeping the cellular clock in sync with the outside world so that it can govern our appetites, sleep, moods and much more.
http://medicalxpress.com/news/2013-05-body-clocks-depressed-people-cell.html