Why you need to sleep in the dark?

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2020-01-08 22:00:07

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Why you need to sleep in the dark?

the light of the Earth seen from space

Imagine the night sky. What is it? In fact, city dwellers haven't seen a real dark sky. The reason is caused by the abundance of artificial lighting. It is not excluded that after seeing the sky the way it should be in the dark, many won't believe their eyes and not recognize the milky Way. Thus, according to the , which was published in June 2019, 80% of the world population lives under light polluted skies. Furthermore, night lighting, whether the light from street lamps, computer screens or smart phones is causing serious harm, depriving people of a healthy night's rest.

Why to immerse your bedroom in the dark?

A string of research devoted to the problems associated with artificial lighting and its impact on the health of humans and animals. Artificial light has negative effects on circadian rhythms — circadian rhythms with a period of about 24 hours, which defines and wakefulness, as well as regulate the functioning of the organism. Thus, in mammals, the work of the circadian rhythm controls body temperature, hormones, immune and digestive systems. Plenty of light in the dark leads to malfunction of circadian rhythms and regular , which is the reason for the increased risk of obesity, type 2 diabetes, breast cancer, prostate cancer, depression and insomnia.

According to the study published in the journal in 2014, in women living in areas of California in the most lit areas are at increased risk of developing breast cancer. A similar connection between outdoor lighting and level of diagnosis of breast cancer are observed not only in USA but throughout the world. So, the Israeli scientists in March last year, reported an increase incidence of prostate cancer in areas with the most light. According to the results of another study, resistance to chemotherapeutic drug doxorubicin increased in the presence of light. Also, animals that are regularly exposed to artificial light at night, tumors develop faster than those who is constantly in the dark.

you see, quite difficult to sleep when there are very light

Writes , Stephen hill, Chairman of the Department of studies of breast cancer at the University of Tulan, advised to buy the curtains of dense fabric, which does not pass light, and sleep mask. In his opinion, even when the eyelids are closed, the weak light from the lamps into the bedroom, can reach the retina and disrupt circadian rhythms. However, cancer — is not the only side effect, which is thought to be associated with the influence of night light on the body. Randy Nelson, a Professor of neurology at the Ohio state University, has published over two dozen studies in mice and hamsters. The results showed that artificial night lighting increases body weight and causes anxiety. Satellite studies of outdoor lighting has also revealed an increased risk of obesity in individuals who live in highly-lit areas. Moreover, in recent years, emerged a large number of studies that indicate a relation between aging and artificial .

Today the milky Way hidden from third of the population of our planet

However, not all scientists share the view of Stephen hill. So, according to Mariana of figueiró, Professor of the Research center lighting at the Polytechnic Institute of the United States, to ensure that artificial lighting has had such a health, takes a long time to be exposed to artificial light. Anyway, to confidently state that night lighting causes cancer, it is necessary to conduct additional randomized study with a large sample. Today, however, scientists know that artificial lighting disrupts circadian rhythms. So better not to risk it and hang it in the bedroom blackout curtains.

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