The Food and Drug Administration Thursday authorized marketing of 20 nicotine pouches — the first time the products have been greenlit by the agency. Nicotine pouches are tobacco-free sachets filled with nicotine and flavorings that are held between the gums and lips similar to snus,

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.

It’s the first time regulators have authorized sales of the products, which are the fastest-growing segment of the tobacco market.