There are people who many not trying to quit Smoking, they don't. As it turned out, this is not to blame their weak willpower, and genes. American scientists from Durham Duke University revealed some genetic variants that increase the chances of a person very quickly become a heavy smoker. According to the researchers, there are people who belong to high risk group. They once cigarette at quite an early age, very quickly become accustomed to Smoking and start drinking a pack of cigarettes a day. Reaching a more Mature age, they cannot easily give up this bad habit, like the rest.
During the study, researchers examined nearly one thousand people in New Zealand, watching their condition from their birth to attainment of 38 years overseas, in order to detect at all possible genetic risk of becoming a smoker. The researchers found that participants risk groups more often than others have used cigarettes every day, even as teenagers. For 38 years they were so dependent on nicotine that all their attempts to quit Smoking were doomed to failure.
Scholars argue that genes does not affect the person's desire to smoke a cigarette for the first time. But after they began to smoke, they have more severe nicotine dependence associated with a genetic predisposition. While exploring the genetic mechanisms of dependence on tobacco, scientists have identified heavy smokers changes in the genes and DNA that affect the brain and determine the body's response to the intake of nicotine.
The results of the study found that adolescents who had found a genetic predisposition, after my first cigarette, 24% more likely to become chronic smokers at the age of 15 years. In 18 years they smoked 20 or more cigarettes a day. Belonging to the risk group of adult smokers have 27% more likely to become dependent on nicotine, and they are 22% more likely couldn't leave this bad habit compared to other older people.