Quinoa dates back three to four thousand years ago when the Incas first realized that the quinoa seed was fit for human consumption. According to WHFoods quinoa "was the gold of the Incas" because the Incas believed it increased the stamina of their warriors. The Quinoa Corporation calls quinoa the "Supergrain of the Future. " Quinoa is naturally gluten-free and contains iron, B-vitamins, magnesium, phosphorus, pottasium, calcium, vitamin E, and fibers. It is one of only a few plant foods that are considered a complete protein, containing all nine essential amino acids.