I don't know about all gum, but I always used to chew Extra, which has 2 carbs per/piece. I gave it up but I had to have something, since the ketone breath was making me gag and probably everyone else, too!!!!!!!! I got this gum from Atkinscenter online, it's sweetened with xylitol and has 1.6 carb, but it's all sugar alcohol so it's really actually 0 effective carb. BUT, take a gas-x capsule with it, if you're sensitve to sugar alcohol!