[mrsloungitude]

http://blog.casaa.org/2013/08/new-study-confirms-that-chemicals-in.html

This link has a scientific study. The liquid for e-cigarettes is nicotine, glycerine, and propylene glycol.

[mrsloungitude]

http://publichealth.drexel.edu/SiteData/docs/ms08/f90349264250e603/ms08.pdf

Actual abstract of the study.