Beemans gum

Beemans gum (originally Beeman's Gum) is a chewing gum formulated by Ohio physician Edward E. Beeman and first sold in February 1890. It originally contained pepsin, but no longer does. Beemans became popular with early aviators as a good luck charm, and Chuck Yeager is purported to have chewed a stick of Beemans gum before every flight.