I couldn't have quit, or switched, any other way. Heaven knows I tried: gum, Wellbutrin, cold turkey didn't have any long-term results. Even my doctor said my lung functioning has vastly improved since I got off the coffin nails. I'm able to walk around the block, do housework, and even mow my lawn, all without getting out of breath.
E-liquid contains propylene glycol, which is used in asthma inhalers, and/or vegetable glycerin, both regarded by the FDA as GRAS (generally regarded as safe). The only immediate health risks are possible allergic reactions in some people and the fact that it has a tendency to dehydrate you, so drinking extra water is very important when you're vaping.
I don't understand why the PTB are scaring potential ex-smokers by claiming e-cigs are more dangerous than tobacco combustion, other than the threats to corporate profits. I also can't understand why liberal Democrats, who are supposed to be championing harm reduction, oppose vaping as tobacco harm reduction and want to regulate e-juice to the point of a de facto ban. All that will do are put vape shops out of business and drive vaping ex-smokers back to the cancer-causing, life-threatening tobacco. 
BTW, vapers ought to check E-cigarette Forum out.
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