smoking cigarette photo Life's A Drag person smoking cigarette Portrait Of

So I think that was probably a major factor in it

Similarly, puffing behavior or topography may also be an important determinant of nicotine intake and exposure to potentially toxic substances in e-cigarette aerosol, with implications for disease risks

Plasma bupropion concentrations are dose-proportional following single doses of 100 to 250 mg

"Smokers should be reassured that these products can help them quit all tobacco use forever." From May 2016, producers of new e-cigarettes and refill container products in the U.K., will have to comply with the EU's Tobacco Products Directive, which looks at setting standards for safety and quality on these products