Quinoa (pronounced KEEN-wah) is a 7,000-year-old plant that originated in the mountainous regions of South America. While it is commonly known as an “ancient grain,” quinoa is technically not a grain or cereal grain, but a seed, and does not contain gluten. Quinoa is one of the most protein-rich foods we can eat. It is a complete protein containing all nine essential amino acids. Quinoa is also a great source of fiber, lysine riboflavin (B2) magnesium, and manganese.