E-cigarettes — popular battery-powered devices that simulate the act of smoking a traditional cigarette — dispense a vapour derived from liquid chemicals in a refillable cartridge. Researchers from the University of Athens found that short-term exposure to e-cigarettes was enough to cause lung inflammation similar or worse than that seen in traditional cigarette use. The study, published in the American Journal of Physiology – Lung Cellular and Molecular Physiology, examined several groups of mice that received whole-body exposure to varying chemical combinations four times each day. One group was exposed to cigarette smoke, another with e-cigarette vapour containing propylene glycol and vegetable glycerol — an odourless liquid derived from plant oils, the third with e-cigarette vapour containing propylene glycol and nicotine and another group was exposed to e-cigarette vapour containing propylene glycol, nicotine and tobacco flavouring. The level of oxidative stress — stress at a cellular level — in the flavouring group was equal to or higher than that of the cigarette group.
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