Most chewing gum on sale is made from a variety of oil-based synthetic rubbers—similar to the plastic material used in car tires. If you find that thought slightly unsettling, you are not alone.

Park Bo-gum became a superstar in his twenties, beloved for his looks and clean-cut image. After a long hiatus, the Korean actor is back on the small screen and segueing into his thirties with a ...

Forbes contributors publish independent expert analyses and insights. Joan Vos MacDonald is a New York-based writer who covers Korean media.