Is propylene glycol carcinogenic

There have not been a LOT of tests on the carcinogenicity of Propylene Glycol, but what studies have been done show NO carcinogenic effects - even at VERY high doses, in either humans or lab animals.

With the extensive use of the electronic cigarette worldwide - where Propylene glycol is the main carrier used in the nicotine solution - in 10 to 20 years we should have have proof - one way or the other.

NOTE: E-Cigs have been in use Worldwide for approx. 7 years now

• with no problems reported.