The federal agency is advancing two tobacco product standards that would ban menthol cigarettes and all flavored cigars. These new standards aim to build on the 2009 landmark Family Smoking Prevention and Tobacco Control Act, which banned all forms of flavoring agents in cigarettes except for menthol. The National Library of Medicine explains that companies first began adding menthol to cigarettes in the 1920s, but the ingredient didn’t become widely used until the 1950s and ’60s. Today, the American Thoracic Society says an estimated 25 percent of all cigarettes in the U.S. contain menthol.