William Wrigley Jr Co's new Alert Energy Caffeine Gum has prompted the U.S. Food and Drug Administration to look into the potential impact that added caffeine may have on children and adolescents.

The FDA said on Monday it was taking a "fresh look" at the issue in response to the launch of a new caffeinated gum, "and if necessary, will take appropriate action."

While the FDA did not name the gum in its statement, Wrigley launched the product this month, the latest to tout added caffeine. One piece of the gum contains 40 milligrams of caffeine, about as much as a half-cup of coffee, according to Wrigley, which is owned by Mars Inc.