There is another stall factor in sugar alcohols, and potentially alcohol as well. Sugars, including alcohols, will burn before fat will, so if you are trying a ketotic approach to weight loss, it can knock you out of ketosis or stall ketosis if you do not burn the calories off via activity and then some.

Here's my take on it:

http://forum.lowcarber.org/showpost...20&postcount=11