Sen-Sen is a type of breath freshener originally marketed as a "breath perfume" in the late nineteenth century by the T. B. Dunn Company, currently produced by F&F Foods. Sen-Sen bears a strong resemblance to Vigroids, a liquorice sweet made by Ernest Jackson & Company Ltd.
Sen-sen can be purchased today, usually in small packets. Previously it was available in small cardboard boxes. Similar to a matchbox of the time, an inner box slid out from a cardboard sleeve revealing a small hole from which the tiny Sen-sen squares would fall when the box was shaken.
Sen-sen's current ingredients are licorice, gum arabic, maltodextrin, sugar, and natural and artificial flavors.
Mentions in popular culture
Toni Morrison references them in her novel "The Bluest Eye"
Robert Kroetsch references them in his novel "Gone Indian".
Robert Penn Warren references a character named Sen-Sen Puckett "who chewed Sen-Sen to keep his breath sweet" . Character Marvin Frey is described as having "...breath sweetly flavored with Sen-Sen and red-eye"  in his novel All The King's Men.
W. Somerset Maugham mentions them in his novel Of Human Bondage.
Christopher Bram references them in his 1988 novel Hold Tight.
Referenced in an episode of King of Queens. Arthur asks Carrie to pick up a pack, and she replies "OK, I have no idea what that is".
Also referenced in the season 5 episode of Northern Exposure "Fish Story". Joel's Rabbi offers him a Sen-Sen before ingesting a few himself.
Referenced in the M*A*S*H season 6 finale, "Major Topper." While administering placebo pills to patients, Colonel Potter encounters a soldier who says he can't swallow pills and that he "chokes on Sen-Sen."
- "Hildy had brassy blond hair, wore a garnet-colored chiffon bow around her neck, chewed sen-sen, knew all the latest songs and was a good dancer."
- "I could smell Vitalis on his slicked-back hair and Sen-Sen on his breath."
- , Robert Penn. All The King's Men. Forward by Joseph Blotner. 1946. San Diego: Harvest, 1996. 73.
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