I guess having to run to the toilet on a regular basis must burn off a few extra calories.
And yeast overgrowth in the gut will turn a lot of the fructose ingested into alcohol, so the liver and immune system have to work a lot harder.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.