Try to find a gum that lists Zylitol first. I use Zylitol instead of sugar. As with all the sugar alcohols (sorbitol, malitol etc, you could have some stomach upset. However this is temporary.

Stage 4 squamous cell tonsil cancer. Two lymph nodes involved surgically removed before source found to be tonsil. Implant radiation right on tonsil, regular mask radiation therapy for two months and a final Implant radiation. All clear confirmed by PET scans for 6 years.