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Working the Graveyard Shift Ups Your Cancer Risk

December 04, 2007 | 7,671 views
Late-night work hours will soon be listed as a probable cause of cancer. The International Agency for Research on Cancer, which is part of the World Health Organization, plans to add overnight shift work to the list of probable carcinogens.

Scientists suspect that overnight work disrupts your body’s circadian rhythm, which is your biological clock. The hormone melatonin, which suppresses tumor development, is normally produced by your body while you sleep at night.

Nearly 20 percent of the working population in developed countries work night shifts.

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