Actually, it can, because even natural sugars can cause inflammation in the body. Also, if you look up Tyramine Intolerance, you will read that many with IBS have Tyramine Intolerance. Tyramine Intolerance is also linked to migraines. Some of us need to avoid caffeine and sugar all together, and some of us need to avoid the fruit juices. Interestingly, this doesn't necessarily mean cutting out the occasional piece of fruit, unless you are particularly sensitive. When you do look up Tyramine Intolerance, you'll find at least one website that will have a list of common food intolerances. Sugar is a big one, whether it's a natural source of sugar or not. You're better off skipping the juice and sticking with a piece of fruit. You get a lot less sugar in the end and don't miss out on the other health benefits from the piece of raw fruit. Drinking the juice misses out on these other health benefits.
If you do wish to continue drinking juice, stay away from the juices in the non-refrigerated sections. But, be careful about where you get your fresh refrigerated juices. Many of those are no better than refrigerated juices from concentrate. Be sure you are getting freshly squeezed juices that are nothing but the juice.
A good way to ensure that you don't get so much of the natural sugars even from this source of juice, try diluting the juice by either half or a 3:1 ratio with plain water. I followed this trick after learning about it from a natural doctor and for once my stomach didn't burn (food sensitivities) with the diluted juice. It tasted fine to me, too. You might want to try it with only a 2:1 ratio first, in order to adjust your tastebuds to the new idea.
No, everything I drink stays in