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As if shift workers needed a new reason to despise their jobs, the World Health Organization has recently declared night work a “probable carcinogen.” Research shows “higher rates of breast and prostate cancer among women and men whose work day starts after dark.”  This is due to the fact that melatonin, which is integral to the body’s functioning, is usually produced at night, while the body rests. Melatonin production is inhibited by the artificial lighting, putting night-shift workers at risk.