Harmful effects from one puff of shisha-pen vapour: methodological and interpretational problems in the risk assessment analysis

With this letter the authors express their concerns about the applicability of the proposed Margin of Exposure analysis as a method of risk assessment for propylene glycol and glycerol exposure from a shisha-pen type electronic cigarette. The studies used to determine the Margin of Exposure were evaluating the effects in humans or animals of continuous exposure to these chemicals in every single breath, whereas electronic cigarettes are used intermittently by consumers, resulting in lower and discontinuous exposure. Moreover, the authors make no clear distinction between irritation and harm, neither do they discuss the effects of exposure compared to continuous smoking.

Authors: Farsalinos KE, Baeyens F. ;Full Source: Tobacco Induced Diseases. 2016 Jul 7; 14:22. doi: 10.1186/s12971-016-0086-7. eCollection 2016. ;