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Nicotine acts to increase the production of other chemicals in the brain known as neurotransmitters that affect brain function

TotalApprox., 762, 144165 [5] Pauly, JL et al

Though US sales of e-cigarettes are expected to reach $1bn this year, with many brands available, vaping is new enough that there haven't been many studies done yet certainly none of the large-scale, randomised trials that would be necessary to offer conclusive answers about the safety of e-cigarettes, Glantz says

Why it matters: Faster airflow clears smoke and odors quicker in enclosed rooms

Smoking & Cardiovascular Disease Although the relationship between smoking and cardiovascular disease is certain, the reason for this connection is still not entirely clear4