Energy-saving fluorescent lamps, emitting a bright blue light, increase the risk of breast cancer in women, says Prof. Abraham Haim Israel
Abraham Haim of the University of Haifa and his colleagues for several years been studying the link between sleep and the influence of external stimuli on human health. The study found that the direct effect of fluorescent lights at night promotes breast cancer.
At risk, according to scientists, largely exposed to people with impaired internal "clock" mechanisms and, in particular, those who are awake at night at work.
By the way, the World Health Organization (WHO) in December 2007, included people working the night shift in a group with an increased risk of cancer.
Circadian rhythm, the scientists say, due not only to sleep and wake cycles, but also refers to changes in the other parameters: body temperature, hormone levels, metabolism. And also produce hormones during sleep occupies an important place the hormone melatonin.
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Israeli scientists under the leadership of Chaim Abramm analyzed data from 1679 women living in Israel, 794 of whom had breast cancer, and 885 were control group. The results showed that breast cancer risk is increased by 22% in women, sleeping with the light, as compared to those who are sleeping in the dark.
Melatonin is produced by the pineal gland (epiphysis) in the brain. It participates in establishing the circadian (circadian) rhythm affecting the level of secretion of other hormones. And besides, is involved in the regulation of blood pressure, digestion, and a number of other processes and most importantly, it has antitumor effects.
Per day in an adult produces about 30 pg of this hormone. At night, its concentration is 30 times greater than during the day, and the peak activity of synthesis have two hours overnight. This is where scientists and found the risk of fluorescent lighting if the person is in a lit area, melatonin production is reduced at times. This directly increases the risk of raka.A energy-saving lamps that emit a blue light with a wavelength of about 460 nanometers strengthen this effect.
Within two hours of exposure to such light sleep, not only reduces the production of melatonin, but also increases anxiety, and increases the rate pulse. But the familiar yellow light incandescent lamp with a wavelength of 550 nanometers to such effects does not. Therefore Abraham Haim, even introduced a new concept - "light pollution".
However, in an interview with Haim Telegraph newspaper he said that his study does not mean that the replacement of incandescent light bulbs with fluorescent light bulbs eco leads to an increase in the incidence of breast cancer. According to him, all of the above - is only a theory that needs scrutiny.
Recall that not so long ago, the Russian government tried to ban the production of 100-watt light bulbs, but producers lamps ingeniously bypassed the ban, adjusted release 95 cotton bulb ban which the law does not say anything. And the demand is huge, because in contrast to the energy-saving incandescent lamas very affordable price. The fluorescent lamp is almost 20 times more expensive than the usual "light bulbs Ilyich". Source
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