I do not know the answer to what should be done, as that lies with the individual and their aversion to risk.
There are plenty of warning about Xylitol and Crohn's, but I have not found any about D-Mannose and Crohn's. They both bind to E-Coli so I think it is just a matter of time before it is found that D-Mannose presents the same problem. In the case of Xylitol it just appears to aggravate Crohn's. D-Mannose is not used as much commercially, but I suspect the same reaction is likely, at first anyway.
One person with Crohn's died as a result of a large dose of Xylitol after resection surgery. The Xylitol was infused instead of Glucose. The reaction was caused by some other mechanism that could only occur under these extreme circumstances. No one would ever get that much Xylitol under normal circumstances.
http://www.springerlink.com/content/m3544r731g430g77/
I was willing to give the D-Mannose a try, but I was going to start out with small amounts and work my way up slowly and note any reactions. I believe the reason it aggravates Crohn's is for the very same general reason my frequency experiments using E-Coli frequencies caused me pain in my intestines. When you mess with E-Coli, it messes with you.
When you Kill the E-Coli or do it damage, it likely releases some toxins like some other bacteria. This temporarily, "big guess" makes you feel worse. I ended that experiment since I did not know then, what I do now. Actually I should try it again, as it would give me a good indicator as to whether the bacteria is still present after using the Chlorine Dioxide and LDN. If I no longer react to the frequencies, this would be strong evidence, to me anyway, that E-Coli is the main culprit in Crohn's. That would make treating it easy.
When using Xylitol or D-Mannose, you are moving the bacteria around, on its way out, so I suppose this could make the symptoms worse for a while as it is floating around for a time wreaking havok. I think if you stuck with it for a longer time, it would eventually eliminate the bacteria. I have no idea how long that would take. But I would think a daily dose would show improvement in a month or so. Actually, if it worked, all you would have to do is take some everyday, and no more Crohn's.
I am too curious to leave a theory like that alone, so I would try it. I actually think it has a fair chance of working. But, like most everything, it has some risk.
I do not think I could do the experiment any more as I do not think I could improve in any way. I kind of wish I would have tried it earlier, as it has a lot of potential in my mind.
Dan