Tobacco Smoke Changes Chemical Code on DNA

Tobacco Smoke Changes Chemical Code on DNA

A new study helps explain how tobacco smoke causes changes to DNA.

Reuters reports researchers have found tobacco smoke changes a chemical code on DNA, which can sometimes alter gene activity.

Some of the DNA changes reverse when a person quits smoking, but others do not, the researchers report in the journal Circulation: Cardiovascular Genetics.

“Many people think that after five years your health is mostly back to that of a nonsmoker, but that may not be the case,” lead study author Roby Joehanes of Beth Israel Deaconess Medical Center and Harvard Medical School in Boston told Reuters.

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