הנה קצת מאינטרנט(באנגלית)In May 2009 the US Food and Drug Administration (USFDA) Division of Pharmaceutical Analysis tested the contents of 19 varieties of electronic cigarette cartridges produced by two vendors (NJoy and Smoking Everywhere). Diethylene glycol, which is poisonous, was detected in one of the cartridges manufactured by Smoking Everywhere . In addition, tobacco-specific nitrosamines (TSNAs), known cancer-causing agents, were detected in all of the cartridges from one brand and two of the cartridges from the other brand.
In addition, chemical analysis was performed on sample cartridge. The cartridges were found to contain "tobacco-specific impurities suspected of being harmful to humans—anabasine, myosmine, and β-nicotyrine—were detected in a majority of the samples tested."
ולומרות זאת נאמר
A study by researchers at the Boston University School of Public Health in 2010 concluded that electronic cigarettes were safer than real cigarettes and may aid in breaking the habit of smoking. Researchers said that while further studies on electronic cigarettes were needed, "few, if any, chemicals at levels detected in electronic cigarettes raise serious health concerns." Electronic cigarettes were found to be "much safer" than traditional tobacco ones, and had a level of toxicity similar to existing nicotine replacements.
In the report, the level of carcinogens in electronic cigarettes was found to be up to 1,000 times lower than regular cigarettes.
In an online survey from November 2009 among 303 smokers, it was found that e-cigarette substitution for tobacco cigarettes resulted in reduced perceived health problems, when compared to smoking conventional cigarettes (less cough, improved ability to exercise, improved sense of taste and smell).
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