I can tell you one thing, this thread has really given me a lot to chew on.

With all the gut discussion and knowing that fermented foods are supposed to be really good for it, I had some sauerkraut tonight. Now I know it has always had some unpleasant gastric effects on me, but what I am also experiencing tonight is a horrid case of the "pricklies" and seriously increased SFN discomfort. I have never made that correlation before, but it's blatantly obvious right now. I was having a pretty good day symptom-wise until I did that.