5 Surprising Ways E Cigarettes Impact Neuro Health Teen smokers most likely to combine conventional tobacco and e cigarettes Health officials warned that vaping is not a safe alternative to smoking cigarettes, saying e cigarettes expose users to toxic chemicals and high nicotine levels that can harm the lungs and increase addiction. # E Cigarettes May Have Cardiopulmonary Effects On Teenager Vape Groups Scientists Claim My Vape Review E cigarette use among youth in the US declined to the lowest level in a decade CNN