While most quinoa sold in the US is washed and well-processed, it is still a safer bet to rinse it before cooking.There is no reason to play it "safe by washing Quinoa here in the US any longer, and at least one great reason not to.While it is true that those of us who have been using Quinoa for a very long time remember the days when rinsing was a necessity, it is been ages since that was true.