There are many questionable ingredients in chewing gums (including the organic ones you find in health food stores!). Here are a few common ones:

Gum base, a proprietary mix of 46 different chemicals that the FDA allows under the name “gum base.” These substances could be natural plant resins, beeswax, or petroleum-based chemicals.

Artificial antioxidants such as butylated hydroxytoluene (BHT). BHT is linked to cancer risks, asthma, and behavioral issues in children.

Fillers such as talc and cornstarch (which could be genetically modified)

Titanium dioxide to maintain the vibrant white color

Artificial food colors including FD&C color and caramel color

And of course, artificial sweeteners like aspartame.