Exposure to Blue Light at Night May Increase Risk of Prostate, Breast Cancer, Study Says

Exposure to Blue Light at Night May Increase Risk of Prostate, Breast Cancer, Study Says
Exposure to artificial light at night, such as the blue light emitted by most LEDs and computer and smartphone screens, may increase the risk of developing prostate cancer and breast cancer, according to researchers from Spain. Their study, “Evaluating the Association between Artificial Light-at-Night Exposure and Breast and Prostate Cancer Risk in Spain (MCC-Spain Study),” was published in the journal Environmental Health Perspectives. "WHO's International Agency for Research on Cancer (IARC) has classified night shift work as probably carcinogenic to humans. There is evidence pointing to an association between exposure to artificial light at night, disruption of the circadian rhythm, and breast and prostate cancers," Manolis Kogevinas, of the Barcelona Institute for Global Health (ISGlobal) and the study's lead author, said in a press release. Blue light is a part of the visible spectrum and is emitted by most LEDs as well as computer monitors, smartphone screens, and other digital devices. The blue light from our electronic devices is at a higher concentration than that found in natural light. "We know that depending on its intensity and wave length, artificial light, particularly in the blue spectrum, can decrease melatonin production and secretion," said Martin Aubé, physics professor at the College of Sherbrooke in Canada and the study's co-author. “With this study we sought to determine whether night exposure to light in cities can affect the development of these two types of cancer," Kogevinas said. Rese
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