SOME e-cigarette liquids are more toxic than nicotine alone, according to US researchers who developed a new testing method and published in PLOS Biology.
University of North Carolina authors also found small doses of the main ingredients in e-liquids were highly toxic - even without nicotine or flavourings - and that flavours that included cinnamon and vanilla were among the worst.
"We found that e-liquid ingredients are extremely diverse, and some of them are more toxic than nicotine alone and more toxic than just the standard base ingredients in e-cigarettes -- propylene glycol and vegetable glycerin," said study senior-author Robert Tarran.
The authors report that the FDA is only now beginning to regulate e-liquid ingredients, and this work aims to better inform their efforts.
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