An electronic cigarette (e-cigarette) is a device that allows users to inhale nicotine by heating a vapor from a solution containing nicotine, propylene and flavorings.
Since there is no burn, there is no smoke like a traditional cigarette.
But while they have been labeled as being at a lower risk than cigarettes, a growing wave of studies is showing health risks.
Electronic cigarettes do not produce tar or carbon monoxide, but the vapor contains some harmful chemicals.
Nicotine is the highly addictive chemical that makes it difficult for smokers to quit.
Nearly three million people in Britain use e-cigarettes and more than nine million Americans.
1. E-cigarette standard
Battery-powered device containing nicotine e-liquid.
Evaporates the flavored nicotine liquid.
Very similar to normal e-cigarettes but with a more elegant design and a higher concentration of nicotine.
Thanks to its "nicotine salts", manufacturers claim that a pod provides the amount of nicotine contained in a pack of cigarettes.
It consists of an electronic cigarette (battery and temperature control), and an e-liquid pod that is inserted at the end.
The liquid contains nicotine, chemicals and flavors.
Like other vaping devices, it vaporises the e-liquid.
3. IQOS by Philip Morris
Pen-shaped, loaded like an iPod.
It is known as a device "without burning the heat", it heats the tobacco but does not burn it (at 350 ° C compared to 600 ° C of the normal cigarettes).
The company claims that this method reduces the exposure of users to the carcinogen by burning tobacco.