Do Any Chewing Gums With Teeth Whiteners Really Work?

No.

“The way whitening works is that the bleach is in contact with your tooth and it removes stains by oxidation. Chewing gum doesn’t contact the outside of your tooth. It stimulates salivary flow, which will remove staining bacteria off of the chewing surfaces of your teeth and some food particles. If you want to brighten your smile, you need to use a whitening agent that stays on the outside of your teeth for a length of time. I recommend Crest Whitestrips.” — from Men’s Health

I’ve always been skeptical about these kinds of gum. Oh well – I’ll stick with sugar-free.