I use gums with xylitol as well. I also replace sugar with it too. However I have recently stopped chewing because my physio thinks that it may be causing me to tense my jaw which is not helping with the trismus.

Minh

35 Yrs old
03/10 SCC T1-T2
Partial Glossectemy end March - margins not clear enough.
While waiting for resection - cancer returned,2 new cancerous lumps
Re-section End May & flap from cheek attatched. Margins clear.
Mid June - 4 teeth out
Mid July -32 Rads and 3 Cisplatin
6th Sept 10 Finished Treatment!!