Mild, tangy, citrusy flavor. It is high in fiber, and studies have shown that it helps slow down the rate of glucose absorption after a meal, making it a healthy choice for people with diabetes. Buckwheat is also high in manganese, magnesium, copper, and zinc, which are great for the immune system. It also contains all eight essential amino acids, including lysine, which plays a key role in collagen production and is not produced by the human body.