Women who work in night shifts may be at an increased risk of developingbreast cancer, as artificial light blocks a hormone that plays a key role insuppressing growth of its tumours, claims a study.READ ALSO:Supportive partner leads to success!
According to a Study:
- The study showed that women who were premenopausal and were current or past smokers.
- And also who live in areas with high levels of outdoor light at night.
- In addition, were at risk of developing breast cancer - the most commoncancer in women worldwide.
According to Experts:
- In our modern industrialised society, artificial lighting is nearly ubiquitous.
- Our results suggest that this widespread exposure to outdoor lights during night time hours could represent a novel risk factor for breastcancer.
- Melatonin, a hormone produced in the human brain, appears to suppress the growth of breast cancer tumours.
- But exposure to light may decrease its levels, thus disrupting circadianrhythm our internal "clocks" that govern sleepiness and alertness.
- And, in turn, lead to increased breast cancer risk.
- For the new study, the team looked at data from nearly 110,000 women.
- In addition, linked data from satellite images of Earth taken at night toresidential addresses for each study participant.
- As well as considering the influence of night shift work.
- The results showed that women exposed to the highest levels ofoutdoor light at night those in the top fifth.
- They had an estimated 14% increased risk of breast cancer, as comparedwith women in the bottom fifth of exposure.
- As levels of outdoor light at night increased, so did breast cancer rates,the researchers said. But acknowledged that further work is required to confirm the study findings and clarify potential mechanisms.