Blue Light From Street Lamps Linked to Colorectal Cancer

Exposure to blue light from outdoors has been linked to an increased risk of developing colorectal cancer in a study.

Scientists found a positive association between the amount of light in the blue spectrum shining near people’s homes at night and rates of colorectal cancer. They found no link between overall visual light and the disease, however, and the pattern only appeared among those who had smoked at least once in their lifetime.

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