Other than meat, there are other ways to get complete proteins in your meals and buckwheat is one of them!
The term “complete protein” refers to amino acids, the building blocks of protein. There are 20 different amino acids that can form a protein, and 9 that the body can’t produce on its own. These are called essential amino acids—we need to eat them because we can’t make them ourselves. In order to be considered “complete,” a protein must contain all nine of these essential amino acids.
You can view the full article here, at greatist.com
Buckwheat for your health 