What does mint gum have in it that bubble

The active ingredient in mint gum that makes bubbles is gum base. Gum base is a non-digestible, water-insoluble substance that provides the chewiness and elasticity of gum. It is made from a variety of natural and synthetic ingredients, including resins, waxes, softeners, and sweeteners. When you chew gum, the gum base traps air and forms bubbles. The gum base also prevents the bubbles from popping by keeping them enclosed in a thin film.