““We can screw up our biological clocks a lot easier than that, too. Shift work, where employees alternate between days and nights on the job, leads to a significantly higher rate of violence, mood disorders, depression, and suicide. If a shift worker is scheduled even just one night on duty, urinary electrolytes take five days to adjust and eight days for the heart rate to return to normal. The World Health Organization has suggested that shift work is a “possible” carcinogen.””
