E-cigarette flavors such as cinnamon, vanilla, and butter are found to be among the most toxic e-liquid chemicals, that affect the white blood cells finds a new study.

‘Exposure to the e-cigarette flavoring chemicals or e-liquids can lead to production of two harmful biomarkers and so E-liquid flavors should, be regulated, and all its bottles must have a descriptive listing of all ingredients.’

The use of e-cigarettes has exploded in the past decade as traditional cigarette consumption has declined. In the United States alone, more than 500 e-cigarette brands with almost 8,000 uniquely flavored e-juices are available to consumers.




Vaping exposes the lungs to flavoring chemicals when the e-liquids are heated and inhaled. Since the flavoring chemicals are considered safe to eat, e-cigarettes are often considered -- and advertising -- as a healthier alternative to traditional cigarettes. However, the health effects of inhaling these chemicals are not well understood.
This new study, led by researchers at the University of Rochester Medical Centre in the United States, wanted to test the assumption that vaping nicotine-free flavored e-liquids are safer than smoking conventional cigarettes. Previous studies show that flavors used in e-cigarettes cause inflammatory and oxidative stress responses in lung cells.
Users of e-cigarettes also show increased levels oxidative stress markers in the blood compared to non-smokers. The new study extends this to assess the effects of commonly used flavoring chemicals, as well as e-liquids without nicotine, directly on immune cells namely, a type of white blood cell called monocytes.
Exposure to the e-cigarette flavoring chemicals and e-liquids led to higher production of two well-established biomarkers for inflammation and tissue damage mediated by oxidative stress. Furthermore, many of the flavoring chemicals caused significant cell death -- with some flavors being more toxic than others.
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Senior author, Dr. Irfan Rahman, says he hopes this new data will provide insights into understanding the harmful effects of flavored e-juices without nicotine.
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This study directly exposed monocytic blood cells to e-liquids. The authors plan to undertake further research to simulate live vaping, by exposing cells to e-liquid aerosols in an air-liquid interface system. They also call for further long-term human studies to assess the harmful effects of e-cigarettes.
Source-Eurekalert