You are right it is intriguing. I also have fructose malabsorption and pectin is a big no for me. Actually anything prebiotic (oligosaccharides and Fructo-oligosaccharides)tends to set a lot of us off such as chickory root, inulin, ect. Probiotics bother some of us as well so we don't use these as supplements or eat yogurt such as Fiber One, since it will make us worse. Anything too fermented such as sauerkraut also will do numbers on our g.i. Its part of the low fodmap diet that many with FM follow.
I've also heard that Gelatin is a natural source for sulphites and some that react to sulphites will react to Gelatin. I only know that red wine will make me look like rudolph and I blame the higher sulphites in red wine for that. Also cheap wines no matter what the varietal, will get me glowing
This stuff about sulphites is very interesting. Had not really considered sulphites as a problem, but when I look at the list on the following link, I do see several foods/substances that are known to provoke a reaction in my system:
Substances like gelatin, pectin, chocolate (sometimes)... Not sure if it's the sulphites themselves that cause me problems or something else. What's interesting is that for several months earlier this year, I was taking a couple eyedrops for glaucoma that contained sulphites... I had a LOT of systemic problems during those months... Maybe a connection...
It is also interesting that adrenaline/epinephrine (which causes heart palpitations and irregular heartbeat when I have it) is one of the things used to counteract a severe sulfite reaction! (Maybe the old "hair of the dog" remedy at play?)