science

"The scientists analyzed the metal and metalloids inside seven types of disposable devices from three of the most popular brands. Using an instrument to activate the disposable e-cigarettes and heat the internal liquid, they created between 500 and 1,500 puffs for each device. They found:

Some devices emitted surprisingly high concentrations of elements in the vapor, including antimony and lead. Levels of chromium, nickel and antimony increased as the number of puffs increased. Most of the disposable e-cigarettes tested released markedly higher amounts of metals and metalloids into vapors than earlier, refillable vapes."

https://www.ucdavis.edu/news/disposable-e-cigarettes-more-toxic-traditional-cigarettes

https://pubs.acs.org/doi/10.1021/acscentsci.5c00641