Gums with sugar should be avoided. Sugar-free chewing gums are non-harmful. Some may claim that it helps fight activities however no scientific evidence exists. Also, not all sugar-free gums are good. Be aware that non-sugar sweeteners sometimes cause bloating, diarrhea or flatulence. So your decision lies in what suits your body. If you don't have such side effects and you are addicted to it, then go for it. Better avoid gums if you can. Chew neem sticks instead.