I don't know about xylitol, I would be careful with these things! Most of us have already dental work in done, so it is more important how to preserve what's left. I eat little sugar and bone broths regularly. With that low electric current, can that do something if you already have fillings and crowns? One simple thing to add: I realised that hygiene really helps, daily flossing and something un-permie: an electric toothbrush!