500 cigarettes video 500 Cigarettes (Ser_Doink's Version) :

Some research has shown that cells exposed to e-cigarette vapor showed similar genetic changes as cells exposed to conventional cigarette smoke raising concerns that e-cigarettes could potentially lead to lung cancer

Using nicotine before age 25 damages the parts of the brain that control attention, learning, mood and impulse control

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[Google Scholar] 35.Miller M.R., Crapo R., Hankinson J., ATS/ERS Task Force General considerations for lung function testing

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Furthermore this study only takes into account cancer incidence and not the age at which a cancer develops and its prognosis