Chatting with reporters on the White Home garden, Mr. Azar stated that eradicating taste pods from shops simply prompted youths to shift from fruit flavors to menthol and mint, which had been nonetheless accessible, slightly than to cease vaping altogether.

“What we’ve seen has been, and it could be related, an enormous spiking of kids’s utilization of mint and menthol e-cigarettes, which stay, by all producers, accessible in retail shops,” Mr. Azar stated.

The difficulty appeared to hit residence on the White Home, the place Melania Trump attended the assembly with Mr. Azar, Dr. Ned Sharpless, the performing F.D.A. commissioner and the president. “She’s received a son,” Mr. Trump stated of their teenage little one, Barron. “She feels very strongly about it,” he stated.

Juul has repeatedly denied that it aimed its merchandise at minors, however its modern gadgets have grow to be increasingly fashionable and are straightforward to hide. And regardless that the corporate’s array of flavors had disappeared from cabinets, they had been nonetheless accessible on-line, and a number of opponents sprouted up with lookalike variations and comparable flavors to fill the vacuum. Juul had stated that almost 85 p.c of its gross sales had been from mint and different flavors, and that its resolution to cease transport them to shops had dented their gross sales.

On Monday, the F.D.A. took motion in opposition to Juul, sending a warning letter accusing the corporate of violating federal rules by selling its vaping merchandise as a more healthy choice than cigarettes.

As for the company’s resolution to ban most flavors, Ted Kwong, a Juul spokesman, stated the corporate would comply. “We strongly agree with the necessity for aggressive category-wide motion on flavored merchandise,” he stated.

Public well being teams have lengthy clamored for strict curbs on e-cigarettes and flavors, particularly as a result of they nervous that the hovering use amongst youths was hooking a brand new technology on nicotine after a long time of a decline in smoking charges.