As certain monosaccharides and disaccharides can directly raise blood sugar, make blood sugar fluctuate and aggravate the condition of diabetic patients, diabetic patients should pay attention to them. For diabetic patients, they can choose sweeteners, or sugar substitutes: such as xylitol, stevia-like, aminosaccharides or proteoglycans, and fructose. Since sweeteners have a sweet taste and do not contain calories or a small amount of calories, they have little effect on blood sugar and can be eaten by diabetic patients. This will enable diabetic patients to enjoy eating sweets and avoid the rise in blood sugar caused by eating sugar. However, for diabetic patients must be contraindicated: 1, double sugar that raises blood sugar: such as lactose, maltose, sucrose; 2, monosaccharide: glucose. Although diabetics can eat sweeteners, but they should also be careful not to overdo it.