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Night Work – A Higher Risk of Breast Cancer

Night Work – A Higher Risk of Breast Cancer

night work
Women who work at night are exposed to greater risk of developing breast cancer, the study found.

Danish researchers report that women who work at night more than twice a week has up to 40 percent higher risk of breast cancer.

Professional magazine Ocupational and Environmental Medicine adds that the increase in risk was cumulative and that it was still twice as high among women who worked at night for more than six years.

Researchers estimate that 10 to 20 percent of women in modern societies work at night.

According to them, the findings that have been obtained from 18,500 respondents can be explained by the fact of the exposure to artificial light at night which leads to decreased production of the hormone melatonin.

Earlier studies have shown a protective role of melatonin in connection probability of developing some forms of cancer.

In addition, exposure to artificial light at night can disrupt the function of the so-called internal clock of the body and so facilitate the uncontrolled growth of cancer cells and weaken the functioning of the immune system.