Agriculture Canada"...buckwheat (Fagopyrum esculentum) is not a cereal grain, but a fruit or nut."
Birkett Mills: "Buckwheat contains all essential amino acids (eight proteins that the body cannot manufacture) in good proportions, making it closer to being a "complete" protein than any other plant source, even soybeans. "
On a completely unrelated note, I threw out my Buckwheat (otay) necktie last week. I had it for 15 years and it hurt me deeply to get rid of it, but I really couldn't answer one key question for myself - where on earth could I wear this thing without getting beaten up?