Buckwheat is actually a highly allergenic food (potentially dangerous reactions), especially in the East Asian food culture, that I didn’t suspect.
But after allergy tests showed a positive result I looked back at my food and symptoms diary. Immediately after each time I had buckwheat, which I occasionally had since going gluten free, I had noted scratchy sore throat. I’m also highly suspicious it caused GI issues but 1) all these symptoms were on the milder side and 2) I had been eating other problem foods.
Again a case that shows our subjective expectations can cause blindspots. Also, testing and tracking used together are a pretty powerful combination that can help confirm suspicions.
Other similar pseudo grains (seeds) such as quinoa, and amaranth are suspected of causing diarrhea as well. Are they cross reactive to buckwheat?