I got this from a blog about e-cigarettes - interesting :
In the absence of documented test leads to prove e-cigarettes' safety , some experts also point out the propylene glycol, one of many components from the e-liquid that may be potentially harmful. Others are interested in the uncertainty across the actual ingredients from the liquid and raise alarms over the fact that the unregulated e-cigarettes remain mainly stated in China where these were invented in 2003. No protocols and standards exist by yet to be sure the safety of the product. No requirements have been specified to enforce minimum quality standards. Finally, the continued presence of nicotine '" that is an optional ingredient, but is desirable to most users '" also questions the extent of harm reduction. Nicotine is really a proven carcinogenic. Its consumption in different quantity is often a significant health hazard. Moreover, it's highly addicting, with a few studies comparing it to heroin in this connection. Electronic cigarettes contain nicotine in unverified and untested amounts. There were alarming, unconfirmed stories about supposedly nicotine-free e-cigarettes that basically contained the substance
In the absence of documented test leads to prove e-cigarettes' safety , some experts also point out the propylene glycol, one of many components from the e-liquid that may be potentially harmful. Others are interested in the uncertainty across the actual ingredients from the liquid and raise alarms over the fact that the unregulated e-cigarettes remain mainly stated in China where these were invented in 2003. No protocols and standards exist by yet to be sure the safety of the product. No requirements have been specified to enforce minimum quality standards. Finally, the continued presence of nicotine '" that is an optional ingredient, but is desirable to most users '" also questions the extent of harm reduction. Nicotine is really a proven carcinogenic. Its consumption in different quantity is often a significant health hazard. Moreover, it's highly addicting, with a few studies comparing it to heroin in this connection. Electronic cigarettes contain nicotine in unverified and untested amounts. There were alarming, unconfirmed stories about supposedly nicotine-free e-cigarettes that basically contained the substance
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