Quinoa - Saponin ... anyone else have reaction?

For the second time in recent months I've had an apparent reaction to quinoa. Now these weren't controlled experiments so I may be unfairly blaming quinoa but it was the one consistent item in both meals. In each case, I became quite ill within 4 hours. I attributed the first incident to simple food poisoning. Now I've had 2 occurrences. A little bit of internet research suggests that the culprit may be saponin, a naturally occurring substance on the grain/seed. Quinoa should be washed to remove saponin, which I do routinely at home. In the cases where I became ill the food was prepared by others. I haven't asked my hosts if they washed the quinoa in the prep process. 

So my question is..has anyone else experienced this? If so, have you been able to eat quinoa again after a reaction? The little I've found on the internet suggests that once the allergic response is triggered you're at high risk for future reactions. In my case, it wasn't a systemic histamine type reaction but rather a GI response. Heavy nausea and vomiting. I'm not keen to repeat the experience.