Formaldehyde was found at significant levels in one study when they heated the liquid to excessive temperatures. In the same study, when they heated the liquid to a temperature that people actually vape at, the formaldehyde level was significantly lower than in cigarettes. The media and public health zealots got hold of it and twisted the facts, giving the impression that ecigs are more dangerous than cigarettes. There's a lot of this nonsense going on. Tobacco Control is losing control and they'll do anything to try and hold onto it.