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A new study published in the journal Environment Health Perspectives reveals that blue light exposure could increase a man’s risk of prostate cancer and a woman’s chances of developing breast cancer.
Over 4,100 people participated in the research led by the Barcelona Institute of Global Health. The study compiled data from 11 Spanish regions from 2008 to 2013. The people who participated include those with and without breast and prostate cancers between the ages of 20 and 85.
The researchers used questionnaires to evaluate the participants sleeping habits and analyzed images from the International Space Station to determine on how much blue light was found outdoors at night at the location of where the participants slept.
We're all exposed to higher levels of blue light, which disrupts our biological clocks — study co-author Alejandro Sánchez de Miguel, of the University of Exeter
After analyzing the data, the researchers found that exposure to blue light before sleep and areas with heavy outdoor light transmitted thru the bedroom windows were associated with a higher risk of cancer.
Researchers concluded that there seems to be a link between exposure to blue light and the disruption of your circadian rhythm that increases the risk of hormone-dependent cancers.
Full details of the research study can be found here: https://ehp.niehs.nih.gov/doi/10.1289/ehp1837