The staple foods with the lowest glycemic index include oatmeal, rice, germ rice, whole wheat bread, etc. After these foods enter the body, the concentration of decomposed carbohydrates decreases, which has little effect on the concentration of blood sugar and insulin secretion in the body, and the glycemic index is low. Eating more of such foods can effectively control the sugar content from food intake and relieve the symptoms of high blood sugar. It controls blood sugar, increases the effective effect of hypoglycemic drugs, and prevents various complications caused by high blood sugar. Cereals and germ rice also contain many vitamins that can effectively help the body transfer fat factors from the peripheral blood circulation to the liver for metabolism, preventing life-threatening ketoacidosis due to high ketone bodies. It also maintains the elasticity of blood vessels, restores the body’s normal metabolism as much as possible and lowers blood sugar.