Quinoa was of great nutritional importance in pre-Columbian Andean civilizations, being secondary only to the potato, and followed in third place by maize. In contemporary times this crop has come to be highly appreciated for its nutritional value, and the United Nations has classified it as a super crop for its very high protein content (12%–18%).

Unlike wheat or rice (which are low in lysine), quinoa contains a balanced set of essential amino acids for humans, making it an unusually complete foodstuff. This means it takes less quinoa protein to meet one’s needs than wheat protein. It is a good source of dietary fiber and phosphorus and is high in magnesium and iron. Quinoa is gluten free and considered easy to digest.

Because of all these characteristics, quinoa is being considered as a possible crop in NASA’s Controlled Ecological Life Support System for long-duration manned spaceflights.

Quinoa originated in the Andean region of South America, where it has been an important food for 6,000 years. Its name is the Spanish spelling of the Quechua name. Quinoa is generally undemanding and altitude-hardy, so it can be easily cultivated in the Andes up to about 4,000 meters. Even so, it grows best in well-drained soils and requires a relatively long growing season.

In the right, dry conditions it can be stored for years without losing quality.