(WASHINGTON) — Juul Labs said Thursday it will halt sales of its best-selling, mint-flavored electronic cigarettes as it struggles to survive a nationwide backlash against vaping.

The voluntary step comes days after new government research showed that Juul is the top brand among high schoolers who use e-cigarettes and that many prefer mint.

“These results are unacceptable and that is why we must reset the vapor category in the U.S.,” said the company’s CEO K.C. Crosthwaite, in a statement.

Underage vaping has reached what health officials call epidemic levels. In the latest government survey, 1 in 4 high school students reported using e-cigarettes in the previous month, despite federal law banning sales to those under 18.

Under fire for its alleged role in sparking the vaping trend among teens, Juul has made a series of concessions to try and weather a crackdown from local, state and federal officials. It stopped selling popular fruit and dessert flavors in stores last year, and last month, stopped selling them online, too. Earlier, the company replaced its CEO and pledged to stop advertising its products.

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