Jini Says: Xylitol is a natural sweetener that is one of the sugar alcohols (erythritol, sorbitol, mannitol are others). The great thing about xylitol is it causes bacteria to lose their adhesion and "slip off" the teeth. The downside of xylitol is that it can loosen the bowels. So if you are prone to diarrhea, you need to be careful with usage. Toothpaste, mouthwash and a piece or two of gum per day is likely okay. But if you want to use it to sweeten your drinks, or use in baking, then you'll need to be careful. Of course, if you tend to firm stools or constipation, no problem!