Great question — answering as the UphillTech team:
There's some good advice here: http://www.savvyvegetarian.com/blog/advice/food-safety-tips-food-spoilage In summary, everything goes bad, quinoa is no exception. To be safe, refrigerate when possible. Leaving food at room temp is asking for trouble.
Full answer by Kathryn Hurley: https://cooking.stackexchange.com/a/27622 (CC BY-SA 4.0).
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