
E-cigarette flavourings may pose health risk, scientists warn as they call for tougher testing
The IndependentSign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Greek researchers looking at common ingredients in e-cigarette liquids found that mice exposed to tobacco flavouring in the vapour produced higher levels of potentially harmful molecules and inflammation than in mice exposed to traditional cigarettes. Its findings appear to support that e-cigarettes are safer than conventional tobacco products, as only mice exposed to tobacco smoke showed measurable declines in respiratory function in the longer-term tests. The authors write: “The observed detrimental effects in the lung upon vapour exposure in animal models highlight the need for further investigation of safety and toxicity of these rapidly expanding devices worldwide.” For the tests, they exposed groups of mice to either cigarette smoke or vapours containing propylene glycol – a common base ingredient in e-liquids – with added vegetable glycerol, nicotine, or nicotine and tobacco flavouring. However, the mice exposed to the tobacco flavouring also showed increased levels of two inflammation-causing protein molecules, suggesting this component may pose an additional health risk.
History of this topic

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