Almost a third of all genes undergo changes.

The scientists decided to use a meta-analysis by comparing the results of previous studies in order to find similar and different findings in the works.. The researchers studied 16 papers. They described the results of studies of about 16 thousand people..

Some of them were heavy smokers, the other half gave up this bad habit, and the third part consisted of people who had never smoked.. The task of the researchers was to compare the chemical modification of DNA in three groups of subjects.

It turned out that smoking causes changes in DNA. About 7 thousand genes undergo changes, which is 1/3 of all genes present in the human genome. If a person quits a bad habit, then after 5 years the changes disappear. However, there are also such sections of DNA that still remain with “nicotine” marks and do not disappear for about 30 years..

aspect. net.