By Dr. Stephen Phinney and the Virta Team
Xylitol is among the better choices because it is a dental protectant, and because it provides usable energy. And the sweetness does not linger 5-10 minutes later. And of course, xylitol has much less negative GI effects on most people compared to the other sugar alcohols.
The following videos may help clarify this issue.
Dr. Stephen Phinney on artificial sweeteners
Dr. Stephen Phinney on sugar alcohols