Quitting has clear benefits, even late in life. But it does not wipe the slate clean.

"Even decades after cessation, cigarette smoking confers long-term risk of diseases including some cancers, chronic obstructive pulmonary disease, and stroke. The mechanisms for these long-term effects are not well understood. DNA methylation changes have been proposed as one possible explanation." the team from London wrote.">
HEALTHY LIVING . GUIDE



Smoking scars DNA in clear patterns, researchers. Most of the damage fades over time, they found — but not all of it. Their study of 16,000 people found that while most of the disease-causing genetic footprints left by smoking fade after five years if people quit, some appear to stay there forever. The marks are made in a process called methylation, which is an alteration of DNA that can inactivate a gene or change how it functions -- often causing cancer and other diseases.

"Our study has found compelling evidence that smoking has a long-lasting impact on our molecular machinery, an impact that can last more than 30 years," said Roby Joehanes of Hebrew SeniorLife and Harvard Medical School.

Quitting has clear benefits, even late in life. But it does not wipe the slate clean.

"Even decades after cessation, cigarette smoking confers long-term risk of diseases including some cancers, chronic obstructive pulmonary disease, and stroke. The mechanisms for these long-term effects are not well understood. DNA methylation changes have been proposed as one possible explanation." the team from London wrote.






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