More cancer-causing chemicals found in electronic cigarettes

The vapor from electronic cigarettes contains two previously unidentified chemicals that can cause cancer, according to a new study. The new research, published in Environmental Science & Technology, also shows that levels of harmful chemicals vary between e-cigs.

Researchers in the Lawrence Berkeley National Laboratory used two different electronic cigarettes and simulated vaping at different battery power settings. Then they analyzed the e-cigs’ vapor. They found that the vaporizers released 31 harmful chemicals, including two possibly cancer-causing compounds that had never been previously found in e-cig vapor. The amount of chemicals produced varied, based on the temperature at which liquids are "vaporized" by the device’s "heating...