I suspect that the body often down-regulates production of fructose transporters in the gut on a low sugar/low fruit diet, which induces fructose malabsorption. I've tried re-introducing a bit of fruit, mostly bananas and that may be one factor that has made my guts bloat. I'm having better results from reintroducing potatoes, as glucose and starch don't give me any problems. Some fruit about once in a week is no problem but eating it every day in addition to sweet potatoes most days which have moderate amounts of fructose is not good for me.
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.