http://www.wandtv.com/story/32588189/cancer-causing-toxins-found-in-e-cigarettes
Berkeley, CA – Scientists have discovered two additional cancer causing toxins in the vapor of e-cigarettes.
The chemicals, used to create artificial smoke transform into carcinogens when heated.
Their research also found the hotter the e-cigarette coil becomes; the more chemicals are released in its vapors.
That means the first puffs of an e-cigarette tend to contain the fewest toxins.