Percent composition comparison for e-liquid, e-cigarette aerosol, and cigarette smoke: (a) Classic Tobacco Disposable e-liquid Composition. (b) Classic Tobacco Disposable Aerosol Composition (99 puffs, CAN). (c) Marlboro Gold Box Smoke Composition (9 puffs, CAN).

A recent study conducted by Drs. Rana Tayyarah and Gerald A. Long, using a machine to test the ingredients of the vapour produced by electronic cigarettes has shown everything one would expect, and nothing else.

Their study completed under laboratory conditions, using a standardised puffing-machine sought to decipher whether electronic cigarettes produced anything other than the listed ingredients when used. 

Using this 'puffing machine' they found over a period of 99 puffs of vapourised E-Liquid, the ingredients and amounts present in the vapour were as listed: glycerin and/or propylene glycol (75%), water (18%) and nicotine (∼2%).

The scientists also compared this to the chemicals found in tobacco smoke when using the same 'puffing machine', however the results listed are after just 9 puffs: Flavours and Combustion byproducts (41%), Carbon Monoxide (34%), Water (20%), Nicotine (3%) and Glyerin (2%).  This exemplifies the stark difference between the products, aside from their appearance and method of use.

These results were to be expected and are consistent with other similar studies, however with so much recent press concerning electronic cigarettes it is welcome news to many users and sceptics alike.

The vapour produced by e-cigarettes contained around 85 per cent less aerosol nicotine than traditional cigarettes, and roughly 1,500 times less harmful and potentially harmful constituents.  

These harmful constituents, often referred to as HPHCs were considerably lower in electronic cigarette vapour than in tobacco smoke. However the comparison they make with the vapour produced by e-cigarettes, and room air is rather succinct.

From their finding they found that the HPHCs in the E-Liquid vapour was similar to those found in puffing on room air, and that no smoke-derived HPHCs were found at all. This adds weight to the predominate theory that e-cigarettes are not harmful to second hand inhalers, and may be welcome news to business owners who are increasingly turning to electronic cigarettes to save the lost working hours caused by smoking.

Member of the American Council on Science and Health, Dr. Gil Ross commented, “I really have nothing much to add to the study’s summary and abstract. You get out what you put in, and e-cigarettes by and large have only a few chemicals, so there’s just not that much to breathe, either in or out.”

To read the full study, please visit this: LINK