Does all gum you can buy at a store "freshen breath"?

So for example if I buy Juicy Fruit will it make my breath smell just as good as if I used Double Mint, or does ONLY gum that has the word “mint” in it freshen breath?

The saliva that’s stimulated by gum-chewing and swallowed does the breath freshening. The gum flavor just masks it.

This is also good for mild heartburn. If you feel it coming on, you can nip it in the bud by chewing gum.