The pouches are used by less than 2% of US teens, the FDA said in granting the application allowing them to continue to be sold.

The Food and Drug Administration (FDA) announced on Thursday that it authorized the marketing of Zyn nicotine pouches but will be "closely monitoring youth use.""The FDA's decision recognizes the role that Zyn can play in the protection of the public health by helping people switch from cigarettes and other traditional tobacco products,

Zyn and the retailers who sell the product have run afoul of regulators in recent years. The FDA in April of last year warned 119 retailers to stop selling Zyn to underage people, and the company was ordered to pay $1.2 million last year for violating Washington, D.C.’s smokeless tobacco ban.