Researchers have found that the artificial flavor of peppermint in e-cigarettes contains high levels of ingredients that increase the incidence of cancer.
The study revealed the presence of high concentrations of Polygon additive to the flavor of mint and carcinogenic, according to the site "Daily Mail".
The study found that moderate users of the substance are not out of danger.
Polygon - extracted from mint plants - causes liver cancer if it enters the body in high amounts.
The researchers urged organizers to take precautionary steps.
The findings come days after Donald Trump pledged to ban flavored e-cigarettes to prevent young people from smoking them.