Smoking leaves a mark on the human genome in the form of DNA methylation, a process by which cells control gene activity. That’s according to research in the American Heart Association Journal Circulation: Cardiovascular Genetics.

The new findings suggest that DNA methylation could be an important sign that reveals an individual’s smoking history, and could provide researchers with potential targets for new therapies.

Read entire article - http://news.heart.org/smoking-leaves-historical-footprint-in-dna/