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Women are 10 PER CENT more likely to develop the disease if they are exposed to high levels of artificial outdoor light at night, study warns
Living in a bustling metropolis may increase the likelihood of developing breast cancer compared to living in the countryside, a study suggests. Researchers found high levels of exposure to artificial light at night time could increase the risk of the disease by 10 per cent in post-menopausal women.
previous research has found the issue may be the artificial light interfering with the production of the pigment melanin. Melanin is a dark pigment which gives hair and skin its colour. The more melanin that is present, the darker a bodily tissue appears. But melanin is also heavily involved in controlling how the body recovers during sleep and it helps regulate the body's anticipation of darkness. Lab test have also found that the presence of melanin can prevent tumours from growing. It is possible that artificial light interrupts the body's natural circadian rhythm and therefore reduces the amount of melanin the body produces, scientists say.
originally posted by: snowspirit
They’ve found the same thing studying the effects of shift work.
We’re meant to sleep at night, in total darkness, or it messes with the wrong hormones.
Good thick blackout blinds are needed over the bedroom windows.
originally posted by: CrazeeWorld777
a reply to: LABTECH767
Has crime levels actually gone down over the years?? I'm seeing more crime committed daily, monthly and yearly... well, reading about it anyway.
Dr Rena Jones, who was involved in the research, said: 'The small number of studies to investigate this question have often relied on subjective exposure data and yielded inconsistent results.
'We utilised an objective exposure measure - estimated outdoor light at night from satellite data.
'It will be important for future studies to accurately measure light at night exposure for individuals using a combination of objective measures, carefully designed questionnaires, and personal measurement devices.'
The study, published today in the International Journal of Cancer, does not provide an explanation behind the link as it was only an observational assessment.
The latest study focused on outdoor light levels, but a 2018 paper published in the British Journal of cancer found indoor light does not have an impact on cancer risk.
Institute of Cancer Research scientists assessed how much artificial light a person used in their bedroom. A questionnaire gathered data on more than 100,00 Britons.
It found no association between levels of indoor light at night and breast cancer risk.
These findings were echoed in a 2019 study, also published in the British Journal of Cancer, which assessed cancer risk in 102,869 women between 2003 and 2014.
Of these women, 2,059 developed breast cancer. However, the researchers found working at night under artificial light does not increase the risk of the disease.
The researchers from the NIH add that various other factors can influence a person's risk of developing breast cancer.
'Our findings also suggested that the relationship between LAN and breast cancer risk may differ by individual characteristics, such as smoking, alcohol drinking, sleep duration and BMI, and neighbourhood environment,' they write.