ELECTRONIC CIGARETTES: The battery-powered devices made of plastic or metal heat a liquid nicotine solution, creating vapor that users inhale. Some models are disposable, and some are designed to be refilled with cartridges or tanks containing what enthusiasts call “e-juice.” Some e-cigarettes are made to look like a real cigarette with a tiny light on the tip that glows like the real thing.
WHAT’S IN THEM: The ingredients in the liquid used in most e-cigarettes include nicotine, water, glycerol, propylene glycol and flavorings. Propylene glycol is a viscous fluid sometimes used in antifreeze but also as a food ingredient.
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