The health risks of electronic cigarettes are always controversial. Indisputable , however, is that unlike the traditional cigarette no combustion takes place . Toxic substances such as carbon monoxide , arsenic or cyanide , which may result from the combustion of tobacco is not inhaled so . Also, a study published in October 2012 did not see any significant risks to human health. In the measured by-products , the authors of the study could only detect very small loads compared to a tobacco cigarette. The propanediol, which is the main component of the liquids is deemed to be safe when taken orally . During a study , however, showed side effects during inhalation : in the subjects came to the eyes and throat irritation . The Federal Institute for Risk Assessment warns of risks. For the investigation of shisha tobaccos introduced this different tests on animals and discovered that inhalation of glycerol and propanediol to changes in the cell epithelium of the larynx and cause irritation of the nasal mucosa to nose bleeds may cause .
In addition, the liquid is often mixed with flavourings which, although approved as a food supplement , but for which there are no studies dealing with the effects on the human body , if the substance is vaporized. Also contain some of the preparations nicotine, which is primarily intended smoking cessation. However, do not underestimate that nicotine carries a high potential for dependence . An analysis of 16 different studies on the dangers of e-cigarettes has also shown that the vapor of an e-cigarette carcinogens are much less than in the vapour of a tobacco cigarette.
On the effects of passive smoking there is little tangible evidence . The Federal Institute for Risk Assessment said, that a health risk due to inaccurate data location can not be excluded . At the same time , the Institute ‘s recommendation was from but for safety’s sake , should be valid Non-smoking electric cigarettes in terms of protection, the same rules as for regular cigarettes. A study from 2012 concluded that the passive vapour has only a small influence on the air. Nicotine also could not be detected in the air here . Also on evaporation no toxic and carcinogenic substances , as in the combustion of a cigarette. With reference to the study and other figures , the researchers concluded that it may be unhealthy to breathe the air of a big city , as to be located with an electronic cigarette australia smokers in a room.