What are the harmful ingredients in Juul pods? JUUL Pod Ingredients: What's in E Cigarettes? Juul took a page from Big Tobacco to revolutionize vaping Los Angeles Times JUUL electronic cigarette products linked to cellular damage. The nicotine concentrations are sufficiently high to be cytotoxic, or toxic to living cells, when tested in vitro with cultured respiratory system cells : What are the harmful ingredients in Juul pods? E cigarette giant Juul quits selling fruit flavored vape pods to stores Los Angeles Times