I just did a huge presentation on E cigs for my dissertation.
This is my take on them.
They are not yet approved by the FDA, but they started on that process this week. It will take about three years for the approval to go through.
There are two types - the cigalike, and the 2nd generation.
The cigalike are the "blu" type. They look like a cigarette and they come with prefilled cartridges that you have to buy.
The 2nd gens come with a chamber that you fill with liquid.
There are between 9 and 450 times less harmful toxic chemicals in an ecig than a traditional. Contrary to popular belief it is not the nicotine in a cigarette that is the carcinogen, it is all the other chemicals that are produced.
They contain no tobacco. In fact they only contain just a few ingredients.
Propylene glycol (PG)
Vegetable Glycerin (VG)
Nicotine
Flavorings
distilled water.
The great thing is you can choose the level of nicotine - high med low or none.
They still contain nicotine, which is a vasoconstrictor. Still not good for you. But in my opinion e cigs are a better alternative, and can help you quit. No smell, no staining, and no passive smoking for others.