Here's a guide for adults and children.
If too much Xylitol is consumed in a day you may start to feel ill and have gastric problems. This is why it is important to follow the daily recommended amount. The Xylitol website states Xylitol is safe for everyone as long as less than 10 grams per day is consumed. The ideal amount is 6-7 grams per day.
When starting to give your children Xylitol, start on small amounts until their stomachs get used to the ideal amount which is always less than 6 grams per day for kids. It is recommended you take 5 doses of Xylitol throughout the day to attack plaque and get rid of it.