Cornmeal as a coarse grain, suitable for diabetic patients as a staple food consumption, is conducive to controlling blood sugar, but it can not be lowered blood sugar, any food intake will varying degrees of elevated blood sugar. Cornmeal is a coarse grain, compared with refined rice and white flour, rich in dietary fiber, relatively low carbohydrate content, low calorie, satiety, relatively slow digestion and absorption, low glycemic index, so it is a staple food suitable for diabetic patients. However, cornmeal does not have the effect of lowering blood glucose, diabetic patients need to follow the doctor’s instructions for treatment. For diabetics or people with fat loss needs consuming cornmeal products can be beneficial as it helps stabilize blood glucose levels and reduce caloric intake. Although cornmeal has many benefits, but it is not suitable for all people, such as severe peptic ulcer and other diseases patients, the consumption of cornmeal can aggravate the burden on the gastrointestinal tract, resulting in the aggravation of the original condition; the elderly and frail people overconsumption of cornmeal may lead to dyspepsia, abdominal distension, abdominal pain and other symptoms. If necessary, the patient can consult a professional physician, under the guidance of the physician to develop a personalized recipe, so as to avoid improper diet leads to adverse consequences.