Study says e-cigarettes may lead to cancer and heart disease

Vaping may raise cancer and heart disease risk, study suggests

The researchers stressed that the study disputes the misconception of many smokers and doctors that smoking only a few cigarettes causes little or no risk. A Californian study using self-reported measures has indicated that teenagers who use e-cigarettes are twice as likely to develop a persistent cough, wheeze, or bronchitis than those who have never used these devices. You may not see more definitive results until additional animal testing in a year, and much longer than that for humans. Tang and colleagues found that the solvent alone does not cause damage to the DNA, but exposure to nicotine and the solvent caused the same damage as exposure to nicotine alone.

UConn's researchers tested how known cancer-causing chemicals found in regular cigarettes damaged a DNA sample and compared it to how the various chemicals e-cigarettes use affected DNA. The study seems to reaffirm the basic premise that e-cigarettes aren't as risky as tobacco products, but it isn't the first to suggest they (not to mention the various flavours added to them) have their own set of risks.

The more than 600-page report examined the health consequences of e-cigarettes with regards to the population as a whole. By 2015, 16 per cent of American high school students said they used e-cigarettes, making it the most popular nicotine product among kids.

"We just can not guess with the data we have", Tang said. NNAL, another member of the nitrosamine family that damaged the smoking mice's DNA, was found to be reduced by 97% in E-cigarette smokers as opposed to tobacco smokers in another recent study.

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"It would seem clear based on the number of toxic substances and the lack of combustion that e-cigarettes should be lower risk than tobacco cigarettes". These results indicate that smokers have much to gain by switching to e-cigarettes.

Battery-powered e-cigs have been widely promoted as a safer alternative to cigarettes because they do not burn tobacco - but scientists now warn the nicotine in them is far from harmless. Similar effects were observed in cultured human lung and bladder cells exposed to nicotine and nicotine-derived nitrosamine ketone (NNK), a carcinogenic nicotine derivative.

They concluded that men who smoke a cigarette a day have 46% of the increased risk of heart disease and 41% of stroke risk for those who smoke a pack a day.

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