Interesting reading. If fructose malabsorption is so prevalent, then what is the explanation for people's success on the Specific Carbohydrate Diet, despite a relatively high fructose load? For instance, why am I experiencing less gas and bloating now, despite eating plenty of fructose containing foods, than before when I was eating a significant amount of rice and oatmeal and bread?
Why is my husband, who was running to the toilet up to 10 times a day with bloody D and cramps, even on medication, now 100% symptom free (without medication)? He is consuming apples, dates, oranges, squash, etc on a daily basis.
I think that part of the reason is that neither of us have a problem absorbing fructose.
I think that the other part is that there is something about grains and starches that cause gastrointestinal symptoms. I accept the fact that I don't understand the science. As you pointed out, Dr. Haas developed the SCD in the 1950s, so I acknowledge that there have been new discoveries since then. But I also know that this diet works. Not just for us, but for plenty of people with IBD. I can't point you to a study, but I can point you to websites with plenty of personal testimonials, of people who had taken every drug, who were facing surgery and even death, and sticking to the SCD turned everything around.
I am genuinely interested to understand the science, if the reasons given by Dr. Haas aren't the right ones.
My point in posting in the first place was to advocate for something that has helped my IBS. Maybe I don't understand fully why, but it does, and that's the bottom line. I'm sure fructose malabsorption is a problem for some people, but it most definitely isn't the answer for everyone.