In a recent study, scientists have found electronic cigarette vapor has NO toxic effect on the cells found in human lungs.
http://ejuiceologist.com/new-study-shows-electronic-cigarettes-have-no-toxic-effect/
http://ejuiceologist.com/new-study-shows-electronic-cigarettes-have-no-toxic-effect/
http://ejuiceologist.com/new-study-shows-electronic-cigarettes-have-no-toxic-effect/
http://ejuiceologist.com/new-study-shows-electronic-cigarettes-have-no-toxic-effect/