People with diabetes can eat some coarse grains as staple foods, such as quinoa and brown rice, which help control blood sugar, but in moderation. It should be noted that although these foods can maintain blood sugar stability, they do not play a role in lowering blood sugar. Ordinary rice, steamed bread, noodles and other staple foods have a high glycemic index, so in daily life diabetic patients can properly supplement some coarse grains to replace refined rice, refined noodles, such as quinoa, buckwheat, corn, brown rice and so on. Roughage is not only lower glycemic index than refined rice, refined noodles, but also able to enhance satiety, delay absorption, all help to control blood sugar. Patients with diabetes should eat scientifically under the guidance of a doctor.