Originally Published: 09 MAR 22 11:26 ET

By Michael Nedelman, CNN

(CNN) -- A new move by Congress targets vaping products that remained on the market despite growing efforts to clamp down on flavors that are especially popular among young people.

It comes down to the type of nicotine. While the US Food and Drug Administration has authority over tobacco products, some companies have made their own synthetic nicotine in the lab. Because synthetic nicotine doesn't come from tobacco, companies have managed to circumvent the agency's oversight and keep their flavored products on shelves.

Now, a provision in the omnibus spending bill for fiscal year 2022 would move synthetic nicotine under the FDA's umbrella of tobacco products, according to an announcement Wednesday by Senate Majority Whip Dick Durbin.

"They're trying to create it synthetically and argue they're not under FDA jurisdiction," Durbin told CNN Tuesday. "So we wanted to include synthetic forms in the definition, so that the FDA can do its work."

Durbin, along with a number of public health groups, have said this measure could make a significant impact on flavored products known to appeal to children. Meanwhile, proponents of flavors, including industry advocates and vapers themselves, say they can be a useful tool in helping adult smokers transition to a less harmful alternative.

Youth vaping has declined overall in recent years, but flavored disposable and synthetic nicotine vapes have become a larger slice of the pie.

High schoolers who had vaped within the past 30 days went from 27.5% in 2019 to 19.6% in 2020 to 11.3% in 2021, according to the National Youth Tobacco Survey. It's unclear how much these numbers have been impacted by remote learning during the pandemic.

A majority of these students said they vaped flavored products, as well. In 2021, a disposable brand known as Puff Bar -- which uses synthetic nicotine -- was the most popular among students. More than a quarter of high schoolers who currently vaped said that Puff Bar was their usual brand. CNN has reached out to Puff Bar for comment.

Amanda Wheeler, president of American Vapor Manufacturers, shared her concerns in a statement that the provision could ultimately prevent adult smokers from switching to e-cigarettes, and that it would "extend FDA's reach to products that have no actual, physical connection to tobacco whatsoever."

But a number of public health groups applauded the move.

"Tobacco companies are actively using synthetic nicotine to evade FDA oversight and market flavored e-cigarettes that are known to attract and addict kids," Nancy Brown, CEO of the American Heart Association, said in an emailed statement. "By including FDA oversight of synthetic nicotine in the FY22 omnibus spending bill, Congress will help protect kids from a lifetime of tobacco use and nicotine addiction."