This is technically a latex, per Britannica’s online encyclopedia ― it’s similar to the milky sap of a rubber tree. Scientists have also looked into making the chewy part of chewing gum out ...

A synthetic gum base is most commonly used, which typically uses a food-grade rubber called polyisobutylene. Tree gum or sap was traditionally used as the base of gum, but this natural ingredient ...

You may have heard from your 2nd grade teacher that if you swallow your gum, it could stay in your stomach forever. Or worse, it could grow into a rubber tree. Well, that's true. Don't do it.