Buckwheat is the seed of a plant called "fagopyrum esculentum." It's related to rhubarb, not wheat, rye or barley and despite the confusing name, buckwheat is gluten-free. - Wholegrain - Source of protein - Naturally gluten free - Naturally low in fat Buckwheat is the seed of a plant called "fagopyrum esculentum." It's related to rhubarb, not wheat, rye or barley and despite the confusing name, buckwheat is gluten-free. - Wholegrain - Source of protein - Naturally gluten free - Naturally low in fat