According to a report as reported by NBC News - smoking scars DNA in clear patterns, researchers have found. Most of the damage fades over time — 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.
Read the full story on: http://www.nbcnews.com/health/health-news/smoking-permanently-scars-your-dna-study-finds-n651471
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