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However, the ban was also associated with an increase 45% increase in use of menthol cigarettes, a 34% increase in use of cigars, and a 55% increase in use of pipes, indicating that youth may be substituting menthol cigarettes and other flavored tobacco products in place of flavored cigarettes

Interestingly, the battery output voltage also seems to have an impact on the cytotoxicity of the aerosol vapours, with e-liquids from a higher battery output voltage showing more toxicity to A549 cells [30]

Most of the cases involve THC, sometimes with nicotine, but that doesn't necessarily mean the cause is the THC itself

(via Pixelle.co)

There is no refill and no maintenance

Be persistent and keep your end goal in mind: a smoke-free, healthier life