Lack of sunlight may lead to lung cancer

Maybe you do not believe lack of sunlight may also cause lung cancer yo!

Foreign experts reported that they recently completed more than 100 countries, a study suggested that lack of sunlight may increase lung cancer risk.

Researchers in several continents in 111 countries to carry out the study to assess the latitude, ultraviolet B (UVB) light exposure and in all age groups the relationship between the incidence of lung cancer.

The researchers also analyzed the amount of cloud cover and anthropogenic aerosol use (both of which absorb UVB), and smoking (lung cancer, the main reason) on lung cancer incidence rates.

The results showed that the incidence of smoking and lung cancer most closely, 75% to 85% of lung cancer cases related to smoking. However, sunlight, especially UVB light irradiation (body's main source of vitamin D) also contributed. Closer to the equator, UVB light, the more the amount. The analysis shows that the countries furthest from the equator, the highest incidence of lung cancer, the most recent country from the equator the lowest rate of lung cancer. The higher the amount of cloud cover and atmospheric levels of suspended particles also increased incidence of lung cancer.

Men smoking increases the incidence of lung cancer, while UVB rays can reduce the number of lung cancer incidence. Female smoking, the amount of cloud cover and atmospheric aerosols will increase the incidence of lung cancer, while UVB rays can reduce the number of lung cancer incidence. Correction factors of smoking, UVB light protection still exist.

The researchers believe that the relationship between lung cancer and the sun is from the chemical point of view makes sense of. Because experimental studies have shown that vitamin D can lead to tumor cell death, thereby inhibiting tumor growth. Although the main reason for smoking is lung cancer, but the more UVB rays to reduce the incidence of lung cancer.