Whether to ban menthol-flavored cigarettes is up for public comment through Tuesday, Aug. 2. The Food and Drug Administration (FDA) proposed banning menthol flavoring in cigarettes earlier this year, stating the additive makes menthol cigarettes easier to use, particularly among youth and young adults.

Of the more than 18.5 million menthol cigarette smokers ages 12 and older in the U.S., the FDA says it expects the public health benefit of a ban on menthol to be greatest among young adults and Black smokers. African Americans are most likely to smoke menthol cigarettes and experience disproportionate tobacco-related health disparities.

Dr. J. Taylor Hays, director of Mayo Clinic's Nicotine Dependence Center, explains what makes menthol-flavored cigarettes a concern.

Watch: The Mayo Clinic Minute.

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Nearly 100 years ago, the first mentholated cigarette was created. It was then marketed as a "throat cigarette."

"Menthol mainly acts as a mild local anesthetic," says Dr. Hays.

Menthol cigarettes might add flavor, but that's not the point. Dr. Hays says the numbing effect makes the smoke less harsh, "so they don't get as much coughing, as much irritation in the throat and chest."

While little data suggest that the menthol itself is addictive, Dr. Hays says that when the menthol is used to reduce the irritant effect, people get more nicotine exposure. This enables them to smoke more, inhale more deeply and hold the smoke longer.

Quitting menthol cigarettes might seem like an obstacle.

"If menthol increases the exposure to a very addictive substance — nicotine — then those people who use menthol cigarettes may be more addicted, more dependent," he says.

But Dr. Hays says increased dependency should not discourage anyone. Help is available.

"They may be more dependent, but the approaches that we take to treatment work, regardless of the type of tobacco you're using."

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