Federal health officials on Thursday backed the public health benefits of nicotine pouches, authorizing Philip Morris International’s Zyn to help adult smokers cut back or quit cigarettes.

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.

The FDA authorized the marketing of 20 Zyn products on Thursday, marking the first allowance for the fast-growing nicotine pouches.

The move could help millions of Americans quit smoking while preventing many more from becoming addicted. The proposed rule, published Wednesday in a 334-page report, would cap nicotine levels in cigarettes and other tobacco products,