BTW, I still can't consume moderate to big amounts of certain fruits at one time without symptoms, so I'm still more sensitive than most to fruits and other carbs, but they are less of a problem for me.
I've often wondered if RPDers who need low Carb are Carb intolerant because of microbial overgrowth / microbial toxins.
And perhaps undergrowth of beneficial microbes, damage to the brush border of the intestines and other factors.
Maybe grains and such caused me to be unable to absorb it somehow?
Grains can not only promote microbiotic imbalance in the gut, but also cause damage to the lining of the entire GI tube by triggering an autoimmune response to that tissue, which contains proteins very similar to certain proteins in grains, influenza viruses and pathogenic bacteria (see the work of Loren Cordain). It's not surprising, since these proteins in grains are designed to destroy the intestines of insects that might otherwise feed on the grains.