FILE - In this Thursday, Nov. 10, 2016 file photo, test cigarettes sit in a smoking machine in a lab at the Centers for Disease Control and Prevention in Atlanta. On Wednesday, March 14, 2018, the U.S. Food and Drug Administration announced a sweeping anti-smoking plan to drastically cut nicotine levels in cigarettes. (AP Photo/Branden Camp)
FILE - In this Thursday, Nov. 10, 2016 file photo, test cigarettes sit in a smoking machine in a lab at the Centers for Disease Control and Prevention in Atlanta. On Wednesday, March 14, 2018, the U.S. Food and Drug Administration announced a sweeping anti-smoking plan to drastically cut nicotine levels in cigarettes. (AP Photo/Branden Camp) Credit: Branden Camp

In a bid to drastically reduce the number of U.S. deaths attributed to smoking each year, the Food and Drug Administration on Thursday unveiled a tobacco regulation plan that is notable for its breadth and simplicity: strip cigarettes of their power over users by reducing their nicotine content to nonaddictive levels.

Breaking ranks with an administration bent on scrapping federal regulations, FDA Commissioner Scott Gottlieb described โ€œone possible policy scenarioโ€ that would set a limit of 0.4 milligrams of nicotine per gram of tobacco. Thatโ€™s about 97 percent lower than the nicotine levels in typical cigarettes.

If such a policy were implemented, the number of Americans who quit smoking would be expected to increase by roughly 5 million in just one year, and the smoking rate would in turn plunge to 1.4 percent from its current level of 15 percent. More than 8 million lives would be saved by the end of the century, Gottlieb said โ€” โ€œan undeniable public health benefit.โ€

These estimates come from research published on Thursday by the New England Journal of Medicine that was conducted by scientists at the FDA and their colleagues from Sandia National Laboratories in Albuquerque, N.M.

Although the effort announced on Thursday is an advance notice of proposed rulemaking โ€” the first step in the creation of a new regulation โ€” it represents the FDAโ€™s first effort to dictate what can and cannot be included in a cigarette, according to former Rep. Henry A. Waxman, D-Calif., who championed anti-smoking policies during his decades in Congress.

โ€œIf this could be implemented, it could be a tremendous boon for public health,โ€ Waxman said. โ€œIt is clear nicotine is what keeps people smoking. Itโ€™s a drug that is delivered when cigarettes are inhaled and the reason why so many people find it impossible or difficult to give them up.โ€

Gottlieb, a physician, called for a public debate on what maximum nicotine level would best protect the publicโ€™s health and whether a new limit should be implemented gradually or all at once. He also sought opinions on whether addicted smokers would compensate by smoking more, or create a black market for high-nicotine cigarettes.

โ€œItโ€™s critical that our policies reflect the latest science and is informed by the input we receiveโ€ from groups and individuals with a stake in the outcome, he added.

The FDA action won praise from public health advocates, who lament the loss of 480,000 American lives each year due to smoking.

โ€œThe benefits the FDA cites for this proposal are extraordinary,โ€ said Matthew L. Myers, president of the Campaign for Tobacco-Free Kids. He added that for the proposal to have maximum impact, the FDA should reduce nicotine levels in all combustible tobacco products, not just cigarettes.

The FDA appears to recognize this concern. โ€œIf a standard were to apply to cigarettes only, it could be substantially less effective,โ€ the agency wrote in its regulatory notice.

Tobacco industry representatives, many of whom are seeking FDA approval for new โ€œmodified riskโ€ tobacco products, cautiously applauded the focus on making smoking less dangerous.

James Figlar, executive vice president of research and development for R.J. Reynolds Tobacco Co., said he hopes to work with the FDA to establish โ€œa regulatory framework that is based on tobacco harm reduction and recognizes the continuum of risk.โ€

The proposal harks back to 1976, when tobacco researcher Michael Russell observed that โ€œpeople smoke for the nicotine. But they die from the tar.โ€

In the years since, public health campaigns have relied heavily on nicotine-replacement products such as lozenges and patches to help wean smokers off cigarettes.

Reduced-nicotine cigarettes โ€” such as Marlboro Ultra Lights, which contain 0.5 milligrams of nicotine apiece โ€” have been on the U.S. market for years, but they arenโ€™t very popular and smoking-cessation groups have been reluctant to endorse them, citing the harmful chemicals generated by any combustible product.

But a growing body of research argues in favor of reducing cigarettesโ€™ nicotine content. In trials, people instructed to exclusively smoke very low nicotine cigarettes smoked fewer per day, showed less evidence of the kinds of physiological harms produced by cigarette smoking, and were more likely to try to quit after the trial was over. They did not appear to smoke more cigarettes at a sitting, or to inhale more deeply, in an effort to compensate for the lower levels of nicotine they were getting.

Gottlieb made clear that no decisions had been made about how quickly nicotine levels would be reduced in American cigarettes. The 90-day comment period that precedes the start of federal rule-making opens in mid-June.