Smoking can Permanently Damage DNA – But Quitting can Heal Some Wounds

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By Julie Fidler

A new study published in the American Heart Association (AMA) journal Circulation: Cardiovascular Genetics finds that smoking cigarettes affects the human genome in the form of DNA methylation. [1]

If you quit smoking, the majority of the damage goes away, but not all of it. Translation: smoking causes some permanent damage.

Affecting 1/3 of Known Human Genes

For the study, researchers analyzed blood samples from nearly 16,000 participants from 16 groups included in the Cohorts for Heart and Aging Research in Genetic Epidemiology (CHARGE) Consortium. One of the groups came from the Framingham Heart Study that researchers have followed-up since 1971.

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