"A little more vitamin D might be healthy, but the way DST provides it is not so beneficial to our well-being. Experts have warned about spikes in workplace accidents, suicide and headaches — just to name a few health risks — when DST starts and ends. One 2009 study of mine workers found a 5.7 percent increase in injuries in the week after the start of DST, which researchers thought was most likely due to disruption in the workers’ sleep cycles. An examination of Australian data found a slight uptick in male suicides in the weeks following time shifts, to the effect of half an excess death per day, which the researchers blamed on the destabilizing effect of sleep disruption on people with mental health problems. And some physicians warn that changes in circadian rhythm can trigger cluster headaches, leading to days or weeks of discomfort.
The literature on these health effects is far from conclusive, but spring sunshine does not outweigh the downsides of sleep disruption across the board."
http://www.washingtonpost.com/opinions/five-myths-about-daylight-saving-time/2015/03/06/970092d4-c2c1-11e4-9271-610273846239_story.html?hpid=z4
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