Three Zyn packets.

JUUL, a popular e-cigarette brand in the U.S., began gaining traction among American teenagers in 2017, leading their use of electronic cigarettes to surge in 2018, but the brand didn’t appear by name on the National Youth Tobacco Survey until 2019. The delay in identifying JUUL as the market catalyst kept regulators from getting ahead of the problem and led them to fund a new monitoring system designed to detect emerging tobacco threats in real time.