Scientist: The FDA is yet to weigh in on the effects of electronic cigarettes on long-term health  Electronic cigarettes heat up a liquid and produce the vapor inhaled by the user  The liquid consists of vegetable glycerin and propylene glycerol at varying ratios  Artificial flavoring is also added to the liquid  Although the FDA has approved vegetable glycerin, propylene glycerol, and artificial flavors for consumption, little is known about the effects of consuming their vapors
However, electronic cigarettes do not produce tar, which is one of the most dangerous chemicals in tobacco cigarettes
Smokers should quit tobacco and start using electronic cigarettes.