Hello. It stands to reason that diabetics can eat buckwheat corn steamed bread, but I don't know if the corn steamed bread you mentioned is made of starch. If there is, it is recommended not to eat it, because the sugar in starch is high. Buckwheat food can be eaten as a staple food. "Compendium of Materia Medica" records that buckwheat is bitter in taste, cold and flat in nature, invigorating qi, refreshing, benefiting eyes and ears, and has the functions of lowering qi, relaxing intestines and strengthening stomach. Modern clinical medical observation shows that buckwheat and its products have the functions of lowering blood sugar, lowering blood fat and enhancing human immunity, and have adjuvant therapeutic effects on patients with diabetes, hypertension, hyperlipidemia, coronary heart disease and stroke. These effects are related to eight nutrients contained in buckwheat.