Technically, gum doesn’t go bad, but over time it gets hard, cracks, and tastes less good. The best time to eat gum is between four and six months after it was made.
Most countries do not require chewing gum to have an expiration date because it does not react with other things and has a low amount of moisture. Even when chewing gum has lost a lot of flavour and become hard, it is still safe to chew.
People all over the world have always liked to chew gum. Tree resin was used to make the first types of gum. People have been found to have chewed on tree resin for more than 5,000 years.