Does chewing gum make the jaw bigger or stronger?

Unlikely: Unless you are chewing gum every hour and every day for a long period of time.

Gum chewing.: When we chew gum, we’re not chewing a really solid piece of gum and trying to force our teeth through it until our jaw fatigues and we can’t chew anymore. At least I hope we’re not. As such, chewing gum will not make the muscles of mastication stronger.