Juul, the vape device teens are getting hooked on, explained Vox New improved JUULpods come in two strengths Scottish Local Retailer What's in This?: Juul Pods 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 : E Cigarette Brands Are Skirting the Rules About Health Warning Labels on Instagram, Study Finds The Brink Boston University