Electronic cigarette solutions contain purified or distilled water, food-grade propylene glycol (generally regarded as safe by the FDA) and/or vegetable glycerin, 0% - 3.6% pharmaceutical-grade nicotine (same as that approved by the FDA for use in gums and patches; not considered a cancer risk) and FDA-approved artificial and natural food flavorings. When used as intended, it is nearly scientifically IMPOSSIBLE for those ingredients to have the same health risks associated with cigarette smoke!
tobacco harm reduction experts agree that smokers who switch to e-cigarette vapor eliminate or very nearly eliminate all of the health risks associated with exposure to cigarette smoke, simply by virtue of the lack of toxic and carcinogenic ingredients.