E-cig vapor releases two cancerous chemicals, new study says

Vapor from electronic cigarettes contains two previously undiscovered cancer-causing chemicals, according to a new study.

Researchers at the Lawrence Berkeley National Laboratory found propylene glycol, an eye and respiratory irritant, and glycerin, a skin, eye and respiratory irritant, among 29 other chemicals released in e-cigarette vapor.

Both are considered “probable carcinogens” by federal health officials. They’re used in e-cigarettes to create artificial smoke.