One of the aspects of electronic cigarettes that make them attractive for prior users of traditional tobacco is the similar look and feel that e-cigs have to regular smokes. A problem arises, however, when just vaporizing nicotine, water, and the flavoring ingredients– there is no smoke produced. As a result, propylene glycol (or PG for short) is added to the e liquid mixture in order to produce an colorless vapor when smoking an e-cig. This helps better mimic the action of smoking without producing the dangerous second hand smoke produced by regular tobacco cigarettes.
Read more about why electronic cigarettes use propylene glycol.
