Smoking tobacco can result in long-lasting alteration of dynamic genetic factors 30 years after quitting

Methylation is a biological process that controls the genetic on and off switch (called gene expression and gene silencing).  Habitual use of tobacco can imprint genetic on/off patterns into genes resulting in long-lasting effects.  Ex-smokers are at risk for some cancers and heart disease because of this. [Daily Mail UK Sept 17, 2016; International Journal of Cancer Sept 15, 2016]  Correction is accomplished with folate (vitamin B9) [Experimental Oncology Sept 2015]

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