Quinoa is an ancient grain famous for its protein content. Unlike most grains, quinoa contains all nine essential amino acids—the amino acids that your body can’t make; they’re also key for muscle building. Quinoa contains three more grams of protein per cup than brown rice, and brown rice doesn’t contain all the essential amino acids. That said, quinoa still contains only eight grams of protein per cup, so it shouldn’t be considered a meal’s primary protein source.
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