My dentist had me these xylitol (birch sugar) Chewing Gum recommended to quickly reduce after eating go the acid levels in the mouth again, thus protecting the teeth. Anyway, I can already see that has formed in with the last six months during use significantly less Zahnsein than before. I look forward to the outcome of the next routine inspection shortly. The taste I find the chewing gum also OK. My recommendation: try simply times!