Are there any side-effects to Xylitol use?

Xylitol is rapidly growing in popularity as users discover this great tasting sweetener that clinical studies have proven has no major or long-term side effects, even in doses up to 200g a day.  In fact, a very positive side effect is the very effective role Xylitol plays in the prevention of tooth decay.  Sudden, excessive usage of Xylitol has been known to cause mild gastrointestinal distress in some sensitive users, so as with everything in life, moderation is the key, especially when you first start using this delicious, natural sweetener.  With continued use and as the body adapts to Xylitol, however, these symptoms usually tend to pass.