most e-cigarettes only contain water and flavoring. Composition of electronic cigarette aerosol What's Actually in Your Vape:

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Early evidence suggests an association between e-cigarette use and the development of hypertension and elevated resting heart rate

There are 6 cohorts in KoGES, which are KoGES_ Ansan and Anseong study, KoGES_HEXA (health examinee) study, KoGES_CAVAS (cardiovascular disease association study), KoGES_twin and family study, KoGES immigrant study, and KoGES_emigrant study 21

Depending on the amount of nicotine a person is exposed to, it can also increase a persons focus or talkativeness, or decrease their appetite

The new research, published in the journal Tobacco Control, found that users speed up their puff rate in order to inhale more nicotine because the heat stick lasts for just six minutes, after which the device shuts off and needs to be recharged