Amaranth is one of the oldest things cultivated and eaten by humans. Like, say, more than 8,000 years ago. The Aztecs were the first guys to cultivate this crop, and it is still a native crop in modern-day Peru. The ancient history of amaranth can be traced back to Mexico and the Yucatan Peninsula.
Today, amaranth is grown in Africa, India, Russia, China, throughout South America, and parts of North America.
The reason amaranth is being cultivated for more than 8,000 years now is the stuff it contains – the nutrients.