<<Disclaimer: Verify this information before applying it to your situation.>> Dan Mullings and Listmates, Even though buckwheat is more closely related to rhubarb than the grain family, some people have a problem with it. The reason? We're not for sure. Some of the research my husband and I have done says it may be because buckwheat flour that celiacs reacted to was actually a mix of wheat flour and buckwheat flour. OR, another possibility is that often buckwheat and wheat flour are grown together in the same fields in alternating years; therefor having been contaminated from the start by left over wheat grains gathered at harvest. Yet another possibility is that sometimes wheat and buckwheat are milled in the same run, so the buckwheat flour could of been contaminated at the mill!! Some people can handle this, some people can't. As always, one must gauge for himself what he can or cannot handle!!! Liz Crone