UNITED STATES (OBSERVATORY) – Blue light from smartphones, tablets, and street lights can lead to cancer.
An international study involving the University of Exeter showed that people who experienced high levels of blue light during the night had double the risk of prostate cancer and breast cancer.
It is believed that light from electronic devices disrupts the body’s biological clocks, and may affect hormones that can lead to cancer, according to the findings on blue light.
The researchers measured the blue light outdoors in Barcelona and Madrid, using images from the International Space Station, spotted 3 visible bars of light blue, red and green.
The researchers, led by the Barcelona Institute of World Health, found that people exposed to both indoor and outdoor light (street smartphones) had an increased risk of cancer, according to a study of more than 4,000 people in 11 regions.
“Human beings have evolved to need daylight and dark at night, and we are exposed to higher levels of blue lights, which can disrupt our biological clocks,” said Dr Alejandro Sanchez de Megal, co-author of the study. If this increases the risk of our cancer, now our innovative findings indicate a strong link between blue light and cancer.”
Blue light has long been suspected to cause night shift workers, who are exposed to artificial light longer, to have a higher risk of cancer. The light, which contains one of the shortest wavelengths, reduces the body’s production of melatonin, which plays a key role in regulating the body’s clock.
Experts advise people to avoid bright lights from one to two hours before bedtime.